HISTORY

In addition to the names listed below, the following people provided
useful inputs on many occasions: Paul D. Robertson, Simon J. Mudd.
Apologies for any names omitted.

19980105

	The compiled-in default value for resolve_smtp_sender was
	wrong (from the days that it was a boolean), causing smtpd
	to dump core when the variable was not set in main.cf.

	The INSTALL instructions now have separate sections for
	the three basic ways of running vmailer.

	The INSTALL instructions now have discusses how to deal
	with chrooted processes.

	Ported to RedHat 5.0. My, these people have re-organized
	their include files quite a bit, haven't they.

19980106

	On RedHat Linux 4.2/5.0, when a FIFO listener opens the
	FIFO with mode O_RDONLY, the FIFO remains forever readable
	after the writer has closed it.  Workaround: open the FIFO
	mode O_RDWR.

	Test program: util/fifo_rdonly_bug.c

	Unfortunately, the above fix triggers a bug on BSD/OS 3.1
	where opening the FIFO mode O_RDWR causes select() to claim
	that the FIFO is readable even before any data is written
	to it, causing read() to block or to fail.

	Test program:  util/fifo_rdwr_bug.c

	printfck (check arguments of printf-like function calls)
	found a missing argument in local/command.c

	Miscellaneous Makefile cleanups that I didn't finish before
	the first alpha release.

19980107

	Sometimes the DNS will claim that a domain does not exist,
	when in fact it does. Thus, it is a bad idea to reject mail
	from apparently non-existent domains. I have changed the
	smtpd so that it produces a soft error responses when a
	resolve_smtp_sender test fails with HOST_NOT_FOUND.  Note:
	by default, this test is still disabled.

	The DB and DBM read routines will now automagically figure
	out if (key, value) pairs were written including a terminating
	null byte or not. The DB and DBM write routines will use
	this result to determine how to write, and will fall back
	to per-system defaults otherwise.

	Renamed the README to MUSINGS, and wrote up a README that
	reflects the current status of the software.

	Added -d (don't disconnect) and -c (show running counter)
	option to te smtp-source test program. These tools are
	great torture tests for the mail software, and for the
	system that it runs on.

	Turned down the process_limit parameter (# of parallel smtp
	clients or servers) to avoid unpleasant surprises. You can
	crank up the process_limit parameter in main.cf.

19980111

	Feature: when run by the superuser, mailq now shows the
	mail queue even when the mail system is down. To this end,
	mailq (sendmail -bp) runs the showq program directly instead
	of connecting to the UNIX-domain service socket, and drops
	privileges etc.  as usual.

19980119

	Bugfix: Edwin Kremer spotted an oversight in the negated
	host matching code (for name or address patterns prefixed
	by !).

	Bugfix: upon receipt of a SIGHUP signal, the master now
	disconnects from its child processes, so that the current
	generation of child processes commits suicide, and so that
	the next generation of child processes will use the new
	configuration settings.

	Bugfix: the smtp server now skips the sender DNS domain
	lookup test for foo@[address]

	Bugfix: don't append the local domain to foo@[address]

19980120

	Bugfix: old low-priority bug in some list walk code that
	caused the master to drop core when a service was turned
	off in master.cf.

	Robustness: the mail system should be able to start up and
	to accept local postings even while the naming service is
	down.  For this reason, the mail system no longer uses
	gethostbyname() to look up its own machine name.  Sites
	that use short hostnames will have to specify their FQDN
	in main.cf (this will eventually be done by the system
	installation/configuration procedure). Should the config
	language support backticks so one can say `domainname`?
	What about $name stuff between the backtics?

	Security: the master now creates FIFOs and UNIX-domain
	sockets as the mail owner instead of as root, for better
	protection against subverted mail systems. chmod() is
	susceptible to race conditions. fchmod(), although safer,
	often does not work on sockets.

	Portability: anticipate that all major UNIXes will create
	UNIX-domain sockets with permissions modified by the process
	umask (required by POSIX). For this reason, we always
	chmod() UNIX-domain sockets, unless the system allows us
	to use the safer fchmod() instead.

	Portability: the semi-resident servers now properly handle
	EWOULDBLOCK returns from accept()  in addition to EGAIN
	(on some systems, EAGAIN and EWOULDBLOCK have different
	values).

	Bugfix: the semi-resident servers now properly handle EINTR
	returns From accept().

	Bugfix: Edwin Kremer found that mynetworks() would compute
	(32 - mask) instead of mask.

19980121

	Feature: /etc/vmailer/relocated is used by the local delivery
	program and specifies what mail should be bounced with a
	"user has moved to XXX" message. The main.cf configuration
	parameter is "relocated_maps".  Just like the "virtual_maps"
	config parameter, this feature is off by default, and the
	parameter can have values such as "files" or "files, nis"
	(on hosts equipped with NIS).

19980123

	Cleanup: virtual domain support moved from the queue manager
	to the resolve service, where it belongs.

	Feature: /etc/vmailer/canonical is used by the rewrite
	service for all addresses, and maps a canonical address
	(user@domain) to another address.  Typical use is to generate
	Firstname.Lastname@domain addresses, or to clean up dirty
	addresses from non-RFC 822 mail systems. The main.cf
	configuration parameter is "canonical_maps".  Just like
	the "virtual_maps" config parameter, this feature is off
	by default, and the parameter can have values such as
	"files" or "files, nis" (on hosts equipped with NIS).

19980124

	HPUX10 port and many little fixes from Pieter Schoenmakers.

	Bugfix: isolated an old mysterious bug that could make the
	master deaf for new connections while no child process was
	running.  A typical result was that no pickup daemon would
	be started after the previous one had terminated voluntarily.

	Bugfix: the NIS lookup code did not mystrdup() the NIS map
	name and would access free()d memory.

19980125

	Bugfix: the vstream routines would sometimes ignore flushing
	errors. The error would still be reported by vstream_fclose()
	and vstream_ferror().

	Feature: time limit on delivery to shell commands.  Config
	parameter: command_time_limit. Default value: 100 sec. The
	idea is to prevent one bad .forward file or alias file
	entry from slowly using up all local delivery process slots.

19980126

	Code cleanup: in preparation for SMTP extensions such as
	SIZE, allow an extended SMTP command to have a variable
	number of options.

19980127

	Bugfix: moved canonical map lookups away from the rewriting
	module to the cleanup service, so that canonical map lookups
	do not interfere with address rewriting on behalf of other
	programs. Back to an older trivial-rewrite program version.

	Bugfix: moved virtual map lookups away from the resolver
	back to the queue manager, so that virtual domain lookup
	does not interfere with address resolution on behalf of
	other programs. Back to an older qmgr program version.

19980131

	Feature: integrated and adapted Guido van Rooij's SIZE
	option (RFC 1870), carefully avoiding potential problems
	due to overflow (by multiplying large numbers) or unsigned
	underflow (by subtracting numbers).

	Code cleanup: cleaned up the code that parses the server
	response to the HELO/EHLO command, so that we can more
	reliably recognize what options a server supports.

19980201

	Portability: integrated the IRIX 6 port by Oved Ben-Aroya.

	Portability: the software now figures out by itself if a
	server should open its FIFO read-write or read-only, to
	avoid getting stuck with a FIFO that stays readable forever.

	Bugfix: the cleanup service would terminate with a fatal
	vstream_fseek() error when the queue file was too large.

	Bugfix: the cleanup service could be killed by a signal
	when the queue file became too large.

19980203

	Portability: some systems have statfs(), some have statvfs(),
	and the relevant include files are in a different place on
	almost every system.

	Portability: the makedefs script now nukes the -O compiler
	flag when building on AIX with IBM's own compiler...

19980204

	Portability: HP-UX 9.x support by Pieter Schoenmakers.

	Portability: added SYSV-style ulimit() file size limit
	support for HP-UX 9.x.

	Portability: added some #includes that appeared to be
	missing according to the Digital UNIX cc compiler.

	Bugfix: sys_defs.h now correctly specifies NIS support for
	LINUX2, HPUX9 and HPUX10.

	Security: fixed a file descriptor leak in the local delivery
	agent that could give shell commands access to the VMailer
	IPC streams. This should not cause a vulnerability, given
	the design and implementation of the mailer, but it would
	be like asking for trouble.

	Bugfix: the sendmail -B (body type) option did not take a
	value.

19980205

	Bugfix (SUNOS5): should not have deleted the SVID_GETTOD
	definition from util/sys_defs.h.

	Bugfix (HPUX9): forgot to specify whether to use statfs()
	or statvfs().

	Bugfix (HPUX9): don't try to raise the file size ulimit.

	Bugfix (HPUX9): must specify file size limit in 512-blocks.

19980207

	Robustness: the master process now raises the file size
	limit when it is started with a limit that is less than
	VMailer's file size limit.  File: util/file_limit.c.

	Security: the dns lookup routines now screen all result
	names with valid_hostname(). Bad names are treated as
	transient errors.

	Feature: qmail compatibility: when the home_mailbox parameter
	is set, mail is delivered to ~/$home_mailbox instead of to
	/var[/spool]/mail/username.  This hopefully makes it easier
	to lure people away from qmail :-)

	Robustness: several testers by accident configured relayhost
	the same as myhostname. The programs now explicitly check
	for this mistake.

	Bugfix: deliver_request_read() would free unallocated memory
	when it received an incomplete delivery request from the
	queue manager.

	Robustness: local_destination_concurrency=1 prevents parallel
	delivery to the same user (with possibly disastrous effects
	when that user has an expensive pipeline in the .forward
	or procmail config file).  Each transport can have its own
	XXX_destination_concurrency parameter, to limit the number
	of simultaneous deliveries to the same destination.

19980208

	Robustness: added "slow open" mode, to gradually increase
	the number of simultaneous connections to the same site as
	long as delivery succeeds, and to gradually decrease the
	number of connections while delivery fails. Brad Knowles
	provided the inspiration to do this.

	This also solves the "thundering herd" problem (making a
	bunch of connections to a dead host when it was time to
	retry that host). Let's see when other mailers fix this.

	Feature: Added $smtpd_banner and $mail_version, for those
	who want to show the world what software version they are
	running.

	Bugfix: vmailer-script now properly labels each syslog
	entry.

19980210

	Portability: merged in NEXTSTEP 3 port from Pieter Schoenmakers

	Bugfix: the local delivery program now checks that a
	destination is a regular file before locking it.

19980211

	Robustness: the local delivery agent sets HOME, LOGNAME,
	and SHELL when delivering to a user shell command. PATH is
	always set, and TZ is passed through if it is set.

19980212

	Feature: mailq (sendmail -bp) now also lists the maildrop
	queue (with mail that hasn't been picked up yet).

19980213

	Feature: the smtpd now says: 502 HELP not implemented. This
	should impress the heck out of the competition :-)

19980214

	Feature: local delivery to configurable system-wide command
	(e.g.  procmail) avoids the need for per-user ~/.forward
	shell commands. Config parameter: mailbox_command.

19980215

	Performance: avoid running a shell when a command contains
	no shell magic characters or built-in shell commands. This
	speeds up delivery to all commands. File: util/exec_command.c.

	Bugfix: the local delivery agent, after reading EOF from
	a child process, now sends SIGKILL only when the child does
	not terminate within a limited amount of time. This avoids
	some problems with procmail.  File:  util/timed_wait.c.

19980217

	Portability: folded in NetInfo support from Pieter
	Schoenmakers.

19980218

	Feature: new vmlock command to run a command while keeping
	an exclusive lock on a mailbox.

	Feature: with "recipient_delimiter = +", mail for local
	address "user+foo" is delivered to "foo", with a "Delivered-To:
	user+foo@domain" message header. Files: qmgr/qmgr_message.c,
	local/recipient.c. This must be the cheapest feature.

19980219

	Code cleanup: moved error handling into functions that
	should always succeed (non_blocking(), close_on_exec()).

19980223

	Bugfix: null pointer bug in the cleanup program after
	processing a From: header with no mail address (or with
	only a comment).

19980226

	Robustness: now detects when getpwnam() returns a name that
	differs from the requested name.

	Feature: Added %p support to the vbuf_print formatting
	module.

	Code cleanup: revamped the alias/include/.forward loop
	detection and duplicate suppression code in the local
	delivery agent. This must be the fourth iteration, and
	again the code has been simplified.

19980228

	Robustness: don't treat anything starting with whitespace
	as a header record. Instead, explicitly test for leading
	whitespace where we permit it. Files: global/is_header.c,
	bounce/bounce_flush_service.c, local/delivered.c.

19980301

	Compatibility: the sendmail program now accepts the -N
	command-line option (delivery status notification) but
	ignores it entirely, just like many other sendmail options.

	Bugfix: dns_lookup.c was too conservative with buffer sizes
	and would incorrectly report "malformed name server reply".

19980302

	Bugfix: the local delivery agent was not null-byte clean.

19980307

	Feature: integrated Pieter Schoenmaker's code for transport
	lookup tables that list (transport, nexthop) by destination.

19980309

	Bugfix: delivery agents no longer rename corrupt queue
	files, because programs might fall over each other doing
	so. Instead, when a delivery agent detects queue file
	corruption, it chmods the queue file, simulates a soft
	error, and lets the queue manager take care of the problem.

	Bugfix: the SMTP server implemented VRFY incorrectly.

	Feature: first shot at a pipe mailer, which can be used to
	extend VMailer with external mail transports such as UUCP
	(provided that the remote site understands domain addressing,
	because VMailer version 1 does not rewrite addresses).

	Cleanup: extended the master/child interface so that the
	service name (from master.cf) is passed on to the child.
	The pipe mailer needs the service name so it can look up
	service-specific configuration parameters (privilege level,
	recipient limit, time limit, and so on).

19980310-12

	Cleanup: factored out the pipe_command() code, so it can
	be shared between pipe mailer and local delivery agent.

19980314

	Compatibility: the sendmail program now parses each
	command-line recipient as if it were an RFC 822 message
	header; some MUAs specify comma-separated recipients in a
	command-line argument; and some MUAs even specify "word
	word <address>" forms as command-line arguments.

19980315

	Bugfix: VMailer's queue processing randomization wasn't
	adequate for unloaded systems with small backlogs.

	Bugfix: smtpd now uses double-buffered stream I/O to prevent
	loss of input sent ahead of responses.

19980316

	Bugfix: the smtpd anti-relay code didn't treat all hosts
	listed in $mydestinations as local, so it would accept mail
	only for hosts listed in $relay_domains (default: my own
	domain).

	Bugfix: smtpd now replies with 502 when given an unknown
	command.

19980318

	Cleanup: resolve/rewrite clients now automatically disconnect
	after a configurable amount of idle time (ipc_idle).

19980322

	Tolerance: VRFY now permits user@domain, even though the
	RFC requires that special characters such as @ be escaped.

19980325

	Bugfix: a recipient delimiter of "-" could interfere with
	special addresses such as owner-xxx or double-bounce.

	Tolerance: the SMTP client now permits blank lines in SMTP
	server responses.

	Tolerance: the SMTP client now falls back to SMTP when it
	apparently mistook an SMTP server as ESMTP capable.

	Bugfix: eliminated strtok() calls in favor of mystrtok().
	Symptom: master.cf parsing would break if $inet_interfaces
	was more than one word.

19980328

	Bugfix: user->addr patterns in canonical and virtual tables
	matched only $myorigin, not hosts listed in $mydestination
	or addresses listed in $inet_interfaces.  The man pages
	were wrong too. File: global/addr_match.c.

19980401

	Robustness: FIFO file permissions now default to 0622.  On
	some systems, opening a FIFO read-only could deafen the
	pickup daemon.  Only the listener end (which is opened as
	root) needs read access anyway, so there should not be a
	loss of functionality by making FIFOs non-readable for
	non-mail processes.

19980402

	Compatibility: sendmail -I and -c options added.

19980403

	Feature: virtual lookups are now recursive. File:
	qmgr/qmgr_message.c

19980405

	Implemented sendmail -bs (stand-alone) mode. This mode runs
	as the user and therefore deposits into the maildrop queue.

19980406

	The pickup service now removes malformed maildrop files.

19980407

	The pickup service now guards against maildrop files with
	time stamps dated into the future.

19980408

	Bugfix: in the canonical and virtual maps, foo->address
	would match foo@$myorigin only. This has been fixed to also
	match hosts listed in main.cf:$mydestination and the
	addresses listed in main.cf:$inet_interfaces.

	Bugfix: added double buffering support to the VMailer SMTP
	server. This makes the SMTP server robust against SMTP
	clients that talk ahead of time, and should have been in
	there from day one.

19980409

	Bugfix: the VMailer SMTP client now recognizes its own
	hostname in the SMTP greeting banner only when that name
	appears as the first word on the first line.

19980410

	Feature: smtpd now logs the local queue ID along with the
	client name/address, and pickup now logs the local queue
	ID along with the message owner.

	Bugfix: still didn't do virtual/canonical lookups right
	(code used the non-case-folded key instead of the case
	folded one).

19980418

	Bugfix: the SMTP server did not flush the "250 OK queued
	as XXXX" message from the SMTP conversation history.

19980419

	Bugfix: qmgr would not notice that a malformed message has
	multiple senders, and would leak memory (Tom Ptacek).

19980421

	Portability: in the mantools scripts, the expr pattern no
	longer has ^ at the beginning, and the scripts now use the
	expand program instead of my own detab utility.

19980425

	NetBSD 1.x patch by Soren S. Jorvang.

19980511

	Feature: the SMTP server now logs the protocol (SMTP or
	ESMTP) as part of the Received: header.

	Feature: smtpd now logs the last command when a session is
	aborted due to timeout, unexpected EOF, or too many client
	errors.

19980514

	Bugfix: the queue manager did not update the counter for
	in-core message structures, so the in-core message limit
	had no effect. This can be bad when you have a large backlog
	with many messages eligible for delivery.

	Robustness: the queue manager now also limits the total
	number of in-core recipient structures, so that it won't
	use excessive amounts of memory on sites that have large
	mailing lists.

19980518

	Bugfix: the SMTP client did not notice that the DNS client
	received a truncated response. As a result, a backup MX
	host could incorrectly claim that it was the best MX host
	and declare a mailer loop.

	Added start_msg/stop_msg entries to the vmailer startup
	script, for easy installation.

	Cleanup: VMailer databases are now explicitly specified as
	type:name, for example, hash:/etc/aliases or nis:mail.aliases,
	instead of implicitly as "files", "nis" and so on. Test
	program:  util/dict_open.  This change allowed me to
	eliminate a lot of redundant code from mkmap_xxx.c, and
	from everything that does map lookups.

19980525

	Bugfix: local/dotforward.c compared the result of opening
	a user's ~/.forward against the wrong error value.

19980526

	Bugfix: the smtpd VRFY command could look at free()d memory.

	Robustness: the smtpd program had a fixed limit on the
	number of token structures.  The code now dynamically
	allocates token structures.

	Bugfix: the queue manager still used the deprecated parameter
	name xxx_deliver_concurrency for concurrency control, but
	the documentation talks about the preferred parameter name
	xxx_destination_concurrency.  Fix: try xxx_destination_concurrency
	first, then fall back to xxx_deliver_concurrency.

19980621-19980702

	Cleanup: the string read routines now report the last
	character read or VSTREAM_EOF. This change is necessary
	for the implementation of the long SMTP line bugfix.

	Bugfix: the smtp server exited the DATA command prematurely
	when the client sent long lines. Reason: the smtp server
	did not remember that it broke long lines, so that '.'
	could appear to be the first character on a line when in
	fact it wasn't.

	Bugfix: the queue manager made lots of stupid errors while
	reading $qmgr_message_recipient_limit chunks of recipients
	from a queue file. This code has been restructured.

19980706

	Performance: the cleanup program now always adds return-receipt
	and errors-to records to a queue file, so that the queue
	manager does not have to plow through huge lists of
	recipients.

	Robustness: the initial destination concurrency now defaults
	to 2, so that one bad message or one bad connection does
	not stop all mail to a site. The configuration parameter
	is called initial_destination_concurrency.

	Performance: the per-message recipient limit is now enforced
	by the queue manager instead of by the transport. Thus, a
	large list of recipients for the same site is now mapped
	onto several delivery requests which can be handled in
	parallel, instead of being mapped onto one delivery request
	that is sent to limited numbers of recipients, one group
	after the other.

19980707

	Cleanup: the queue manager now does an additional recipient
	sort after the recipients have been resolved, so that the
	code can do better aggregation of recipients by next hop
	destination.

	Feature: lines in the master.cf file can now be continued
	in the same manner as lines in the main.cf file, i.e. by
	starting the next line with whitespace.

	Feature: the smtp client now warns that a message may be
	delivered multiple times when the response to "." is not
	received (the problem described in RFC 1047).

	Cleanup: when the queue manager changes its little mind
	after contacting a delivery agent (for example, it decides
	to skip the host because a transport or host goes bad),
	the delivery agent no longer complains about premature EOF.
	File: global/deliver_request.c

19980709

	Bugfix: when breaking long lines, the SMTP client did not
	escape leading dots in secondary etc. line fragments.  Fix:
	don't break lines. This change makes VMailer line-length
	transparent.  Files: global/smtp_stream.c, smtp/smtp_proto.c.

19980712

	Cleanup: the queue manager to deliver agent protocol now
	distinguishes between domain-specific soft errors and
	recipient-specific soft errors.  Result: many soft errors
	with SMTP delivery no longer affect other mail the same
	domain.

19980713

	Feature: the file modification time stamp of deferred queue
	files is set to the nearest wakeup time of their recipient
	hosts, or if delivery was deferred due to a non-host problem,
	the time stamp is set into the future by the configurable
	minimal backoff time.

	Bugfix: the SMTP client and the MAILQ command would report
	as message size the total queue file size. That would
	grossly overestimate the size of a message with many
	recipients.

	Bugfix: the 19980709 fix screwed up locally-posted mail
	that didn't end in newline.

19980714

	Robustness: the makedefs script now defaults to no optimization
	when compiling for purify.

19980715

	Robustness: the makedefs script now defaults to no optimization
	when compiling with gcc 2.8, until this compiler is known
	to be OK.

	Workaround: when sending multiple messages over the same
	SMTP connection, some SMTP servers need an RSET command
	before the second etc. MAIL FROM command. The VMailer SMTP
	client now sends a redundant RSET command just in case.

	The queue manager now logs explicitly when delivery is
	deferred because of a "dead" message transport.

19980716

	Feature: mailq and mail bounces now finally report why mail
	was deferred (the reason was logged to the syslog file
	only).  Changes were made to the bounce service (generalized
	to be usable for defer logs), showq service (to show reasons)
	and the queue manager.

	As a result the defer directory (with one log per deferred
	message) may contain many files; also, this directory is
	accessed each time a message is let into the active queue,
	in order to delete its old defer log. This means that hashed
	directories are now a must.

19980718-20

	Feature: configurable timeout for establishing smtp
	connections.  Parameter:  smtp_connect_timeout (default 0,
	which means use the timeout as wired into the kernel).
	Inspired by code from Lamont Jones. For a clean but far
	from trivial implementation, see util/timed_connect.c

	Cleaned up the interfaces that implement read/write deadlines.
	Instead of returning -2, the routines now set errno to
	ETIMEDOUT; the readable/writable tests are now separate.

19980722

	Feature: the default indexed file type (hash, btree, dbm)
	is now configurable with the "database_type" parameter.
	The default value for this parameter is system specific.

	Feature: selectively turn on verbose logging for hosts that
	match the patterns specified via the "debug_peer_list"
	config parameter.  Syntax is like the "bad_smtp_clients"
	parameter (see global/peer_list.c). The verbose logging
	level is specified with "debug_peer_level" (default 2).

	Security: the local delivery agent no longer delivers to
	files that have execute permission enabled.

19980723

	Workarounds for Solaris 2.x UNIX-domain sockets: they lose
	data when you close them immediately after writing to them.
	This could screw up the delivery agent to queue manager
	protocol.

19980724

	Cleanup: spent most of the day cleaning up queue manager
	code that defers mail when a site or transport dies, and
	fixed a few obscure problems in the process.

19980726

	Feature: the admin can now configure what classes of problems
	result in mail to the postmaster. Configuration parameter:
	"notify_classes".  Default is backwards compatible: bounce,
	policy, protocol, resource, and software.

19980726-28

	Feature: the admin can now configure what smtp server access
	control restrictions must be applied, and in what order.
	Configuration parameters:  smtpd_client_restrictions,
	smtpd_helo_restrictions, smtpd_mail_restrictions and
	smtpd_rcpt_restrictions. Defaults are intended to be
	backwards compatible. The bad_senders and bad_clients lists
	are gone and have become db (dbm, nis, etc) maps. Files:
	smtpd/smtpd_check.c, config/main.cf.

19980729-31

	Feature: hashed queues. Rewrote parts of the mail queue
	API.  Configuration parameters: "hash_queue_names" specifies
	what queue directories will be hashed (default: the defer
	log directory), "hash_queue_depth" specifies the number of
	subdirectories used for hashing (default 2).

19980802

	Bugfix: the pipe mailer should expand command-line arguments
	with $recipient once for every recipient (producing one
	command-line argument per recipient), instead of replacing
	$recipient by of all recipients (i.e.  producing only one
	command-line argument).  This is required for compatibility
	with programs that expect to be run from sendmail, such as
	uux. Thanks to Ollivier Robert for helping me to get this
	right.

	Code cleanup: for the above, cleaned up the macro expansion
	code in dict.c and factored out the parsing into a separate
	module, mac_parse.c.

19980803

	"|command" and /file/name destinations in alias databases
	are now executed with the privileges of the database owner
	(unless root or vmailer).  Thus, with: "alias_maps =
	hash:/etc/aliases, hash:/home/majordomo/aliases", and with
	/home/majordomo/aliases* owned by the majordomo account,
	you no longer need the majordomo set-uid wrapper program,
	and you no longer need root privileges in order to install
	a new mailing list.

19980804

	Added support for the real-time blackhole list.  Example:
	"client_restrictions = permit_mynetworks, reject_maps_rbl"

	All SMTP server "reject" status codes are now configurable:
	unknown_client_reject_code, mynetworks_reject_code,
	invalid_hostname_reject_code, unknown_hostname_reject_code,
	unknown_address_reject_code, relay_domains_reject_code,
	access_map_reject_code, maps_rbl_reject_code. Default values
	are documented in the smtpd/smtpd_check.c man page.

19980806-8

	Code cleanup: after eye balling line-by line diffs, started
	deleting code that duplicated functionality because it was
	at the wrong abstraction level (smtp_trouble.c), moved
	functionality that was in the wrong place (dictionary
	reference counts in maps.c instead of dict.c), simplified
	code that was too complex (password-file structure cache)
	and fixed some code that was just wrong.

19980808

	Robustness: the number of queue manager in-core structures
	for dead hosts is limited; the limit scales with the limit
	on the number of in-core recipient structures. The idea is
	to not run out of memory under conditions of stress.

19980809

	Feature: mail to files and commands can now be restricted
	by class:  alias, forward file or include file. The default
	restrictions are:  "allow_mail_to_files = alias, forward"
	and allow_mail_to_commands = alias, forward". The idea is
	to protect against buggy mailing list managers that allow
	intruders to subscribe /file/name or "|command".

19980810-12

	Cleanup: deleted a couple hundred lines of code from the
	local delivery agent. It will never be a great program;
	sendmail compatibility is asking a severe toll.

19980814

	Cleanup: made the program shut up about some benign error
	conditions that were reported by Daniel Eisenbud.

19980814-7

	Documentation: made a start of HTML docs that describe all
	configuration parameters.

	Feature: while documenting things, added smtpd_helo_required.

19980817

	Bugfix: at startup the queue manager now updates the time
	stamps of active queue files some time into the future.
	This eliminates duplicate deliveries after "vmailer reload".

	Bugfix: the local delivery agent now applies the recipient
	delimiter after looking in the alias database, instead of
	before.

	Documentation bugfixes by Matt Shibla, Tom Limoncelli,
	Eilon Gishri.

19980819

	GLIBC fixes from Myrdraal.

	Bugfix: applied showq buffer reallocation workaround in
	the wrong place.

	Bugfix: can't use shorts in varargs lists. SunOS 4 has
	short uid_t and gid_t. pipe_command() would complain.

	Bugfix: can't use signed char in ctype macros. All ctype
	arguments are now casted to unsigned char. Thanks, Casper
	Dik.

19980820

	Bugfix: save the alias lookup result before looking up the
	owner.  The previous alpha release did this right.

	Cleanup: mail_trigger() no longer complains when the trigger
	FIFO or socket is unavailable. This change is necessary to
	shut up the sendmail mail posting program, so that it can
	be used on mail clients that mount their maildrop via NFS.

	Experiment: pickup and pipe now run as vmailer most of the
	time, and switch to user privileges only temporarily.
	Files: util/set_eugid.c global/pipe_command.c pipe/pipe.c
	pickup/pickup.c. Is this more secure/ What about someone
	manipulating such a process while not root? It still has
	ruid == 0.

19980822

	Portability: with GNU make, commands such as "(false;true)"
	and "while :; do false; done" don't fail. Workaround: use
	"set -e" all over the place.  Problem found by Jeff Wolfe.

	Feature: "check_XXX_access maptype:mapname" (XXX = client,
	helo, sender, recipient). Now you can make recipient and
	other SPAM restrictions dependent on client or sender access
	tables lookup results.

19980823

	Bugfix: smtpd access table lookup keys were case sensitive.

	Added "permit" and "reject" operators. These are useful at
	the end of SPAM restriction lists (smtpd_XXX_restrictions).

	Added a first implementation of the permit_mx_backup SPAM
	restriction. This permits mail relaying to any domain that
	lists this mail system as an MX host (including mail for
	the local machine). Thanks to Ollivier Robert for useful
	discussions.

19980824

	Bugfix: transport table lookup keys were case sensitive.

19980825

	Portability: sa_len is some ugly #define on some SGI systems,
	so we must rename identifiers (file util/connect.c).

	Bugfix: uucp delivery errors are now sent to the sender.
	Thanks, Mark Delany.

	Bugfix: the pipe delivery agent now replaces empty sender
	by the mailer daemon address. Mark Delany, again.

	Portability: GNU getopt looks at all command-line arguments.
	Fix: insert -- into the pipe/uucp definition in master.cf.

	Bugfix: the smtp server command tokenizer silently discarded
	the [] around [text], so that HELO [x.x.x.x] was read as
	if the client had sent: HELO x.x.x.x. Thanks, Peter Bivesand.

	Bugfix: the HELO unknown hostname/bad hostname restrictions
	would have treated [text] as a domain name anyway.

	Bugfix: the $local_duplicate_filter_limit value was not
	picked up by the local delivery agent. This means the local
	delivery agent could run out of memory on large mailing
	list deliveries.

19980826

	Performance: mkmap/mkalias now run with the same speed as
	sendmail. VMailer now uses a 4096-entry cache with 1 Mbyte
	of memory for DB lookups.  File: util/dict_db.c.

19980902

	Robustness: the reject_unknown_hostname restriction for
	HELO/EHLO hostnames will now permit names that have an MX
	record instead of an A record.

19980903

	Feature: appending @$myorigin to an unqualified address is
	configurable with the boolean append_at_myorigin parameter
	(default: yes).

	Feature: appending .$mydomain to user@host is configurable
	with the boolean append_dot_mydomain parameter (default:
	yes).

	Feature: site!user is rewritten to user@site, under control
	of the boolean parameter swap_bangpath (default: yes).

	Feature: permit a naked IP address in HELO commands (i.e.
	an address without the enclosing [] as required by the
	RFC), by specifying "permit_naked_ip_address" as one of
	the restrictions in the "smtpd_helo_restrictions" config
	parameter.

19980904

	Code cleanup: when an SMTP client aborts a session after
	sending MAIL FROM, the cleanup service no longer warns that
	it is "skipping further client input". Files: cleanup/*.c.
	Thanks, Daniel Eisenbud, for prodding.

	Code cleanup: when an SMTP server disconnects in the middle
	of a session, don't try to send QUIT over the non-existing
	connection. Files: global/smtp_stream.c, smtp/smtp.c.
	Thanks, Daniel Eisenbud, for prodding, again.

	Code cleanup: the VMailer version number has moved from
	mail_params.h (which is included by lots of modules) to a
	separate file global/mail_version.h, so that a version
	change no longer results in massive recompilation.

	Bugfix: Errors-To was flagged as a sender address, so the
	address never was picked up.

	Code cleanup: support for Errors-To: headers completed.

19980905

	Feature: per-message exponential delivery backoff, by
	looking at the amount of time a message has been queued.
	Thanks, Mark Delany.

19980906

	Code cleanup: ripped out the per-host exponential backoff
	code. It was broken by 19980818. It was probably a bad idea
	anyway, because it required per-host, in-core, state kept
	by the queue manager.  All we do now is to keep state for
	$minimal_backoff_time seconds, but only for a limited number
	of hosts. Daniel Eisenbud spotted the problem.

	Lost feature: the SMTP session transcripts now show who
	said what. This feature was inadvertently dropped during
	development. Thanks, Daniel Eisenbud, for reminding.

	Documentation: the hard-coded rewriting process of the
	trivial-rewrite program is described in html/rewrite.html.

	Feature: the local delivery agent now does alias lookups
	before and after chopping off the recipient subaddress.
	This allows you to forward user-anything to another user,
	without losing the ability to redirect specific user-foo
	addresses.

19980909

	Feature: the smtp client now logs a warning that a server
	sends a greeting banner with the client's hostname, which
	could imply a mailer loop.

19980910

	Feature: separate canonical maps for sender and recipient
	address rewriting, so that you can rewrite an ugly sender
	address and still forward mail to that same ugly address
	without creating a mailer loop.  Files: cleanup_envelope.c,
	cleanup_message.c, cleanup_rewrite.c.

19980911

	Feature: virtual maps now support multiple addresses on
	the right-hand side. In the case of virtual domains this
	can eliminate the need for address expansion via local
	aliases, making virtual domains much easier to administer.
	This required that I moved the virtual table lookups from
	the queue manager to the cleanup service, so that every
	recipient has an on-disk status record.  Files: qmgr.c,
	qmgr_message.c, cleanup_envelope.c, cleanup_rewrite.c,
	cleanup_virtual.c.

	Feature: sendmail/mailq/newaliases pass on the -v flag to
	the program that they end up running, to make debugging a
	little easier.

19980914

	Bugfix: some anti-spam measures didn't recognize some
	addresses as local and would do too much work. File:
	smtpd_check.c.

	Bugfix: the smtp sender/recipient table lookup restriction
	destroyed global data, so that other restrictions could
	break. File: smtpd_check.c.

	Bugfix: after vmailer reload, single-threaded servers could
	exit before flushing unwritten data to the client. Example:
	cleanup would exit before acking success to pickup, so the
	message would be delivered twice. Bug reported by Brian
	Candler.

	Cleanup: removed spurious error output from vmailer-script.
	Reported by Brian Candler.

	Tolerance: ignore non-numeric SMTP server responses. There's
	lot of brain damage out there on the net.

19980915

	Feature: the smtp-sink benchmark tool now announces itself
	with a neutral name so that it can be run on the same
	machine as VMailer, without causing Postfix to complain
	about a mailer loop.

	Robustness: on LINUX, vmailer-script now does chattr +S to
	force synchronous directory updates. Fix developed with
	Chris Wedgwood.

19980916

	Bugfix: when transforming an RFC 822 address to external
	form, there is no need to quote " characters in comments.
	This didn't break anything, it just looked ugly.  File:
	global/tok822_parse.c

19980917

	Workaround: with deliveries to /file/name, use fsync() and
	ftruncate() only on regular files.  File: local/file.c

	Workaround: the plumbing code in master_spawn.c didn't
	check if it was dup2()/close()ing a descriptor to itself
	then closing it. Will have to redo the plumbing later.

19980918

	Workaround: on multiprocessor Solaris machines, one-second
	rollover appears to happen on different CPUs at slightly
	different times. Made the queue manager more tolerant for
	such things.  Problem reported by Daniel Eisenbud.

	Workaround: in preparation for deployment with a network-shared
	maildrop directory. make pickup more tolerant against clock
	drift between clients and servers.

19980921

	New vstream_popen() module that opens a two-way channel
	across a socketpair-based pipe. This module isn't being
	used yet; it is here only to complete the vstream code.

19980922

	Code cleanup: the xxx_server_main() interface for master
	child processes now uses a name-value argument list instead
	of an ugly and inflexible data structure.

	Bugfix: moved the test if a non-interactive process is run
	by hand, so that the "don't do this" error message can be
	printed to stderr before any significant processing.

	Bugfix: smtpd now can talk to unix-domain sockets without
	bailing out on a peer lookup problem. Files: smtpd/smtpd.c,
	util/peer_name.c.

	Safety: by default, the postmaster is no longer informed
	of protocol problems, policy violations or bounces.

	Safety: the SMTP server now sleeps before sending a [45]xx
	error response, in order to prevent clients from hammering
	the server with a connect/error/disconnect loop. Parameter:
	smtpd_error_sleep_time (default: 5).

	Feature: the logging facility is compile-time configurable
	(e.g., make makefiles "CCARGS=-DLOG_FACILITY=LOG_LOCAL1").

19980923

	Bugfix: changed virtual/canonical map search order from
	(user@domain, @domain, user) to (user@domain, user, @domain)
	so the search order is most specific to least specific.
	File: global/addr_map.c, lots of documentation.

	Bugfix: after the change of 19980910, cleanup_message
	extracted recipients from Reply-To: etc. headers.  Found
	by Lamont Jones.

19980925

	Bugfix: the change in virtual/canonical map search order
	broke @domain entries; they would never be looked up if
	the address matched $myorigin or $mydestinations. Found by
	Chip Christian who now regrets asking for the change.

	Bugfix: cleanup initialized an error mask incorrectly, so
	that it would keep writing to a file larger than the queue
	file size limit, and so it would treat the error as a
	recoverable one instead of sending a bounce. Thanks, Pieter
	Schoenmakers.

	Bugfix: the "queue file cleanup on fatal error" action was
	no longer enabled in the sendmail mail posting agent.

	Feature: the sendmail mail posting program now returns
	EX_UNAVAILABLE when the size of the input exceeds the queue
	file size limit. NB THIS CHANGE HAS BEEN WITHDRAWN.

19980926

	Code cleanup: the dotlock file locking routine is no longer
	derived from Eric Allman's 4.3BSD port of mail.local.

	Code cleanup: the retry strategy of the file locking routines
	dot_lockfile() and deliver_flock() is now configurable
	(deliver_flock_attempts, deliver_flock_delay, deliver_flock_stale).

	Code cleanup: the master.pid lock file is now created with
	symlink paranoia, and is properly locked so that PID rollover
	will not cause false matches.

	Bugfix: the vbuf_print() formatting engine did not know
	about the '+' format specifier.

	Cleanup: replaced unnecessary instances of stdio calls by
	vstream ones.

19980929-19981002

	Compatibility: added support for "sendmail -q". This required
	a change to the queue manager trigger protocol, and a code
	reorganization of the way queue scans were done. The queue
	manager socket now has become public.

19981002

	SMTPD now logs "lost connection after end-of-message"
	instead of "lost connection after DATA".

19981005

	More bullet proofing: timeouts on all triggers.

19981006

	Bugfix: make the number of cleanup processes unlimited, in
	order to avoid deadlock. The number of instances needed is
	one per smtp/pickup process, and an indeterminate number
	per local delivery agent. Thanks, Thanks, David Miller and
	Terry Lorrah for cleueing me in.

	Bugfix: "sendmail -t" extracted recipients weren't subjected
	to virtual mapping. Daniel Eisenbud strikes again.

19981007

	Compatibility: if the first input line ends in CRLF, the
	sendmail posting agent will treat all CRLF as LF. Otherwise,
	CRLF is left alone. This is a compromise between sendmail
	compatibility (all lines end in CRLF) and binary transparency
	(some, but not all, lines contain CRLF).

19981008

	Robustness: stop recursive virtual expansion when the
	left-hand side appears in its own expansion.

19981009

	Portability: trigger servers such as pickup and qmgr can
	now use either FIFOs or UNIX-domain sockets; hopefully at
	least one of them works properly. Trigger clients were
	already capable of using either form of local IPC.

19981011

	Feature: masquerading. Strip subdomains from domains listed
	in $masquerade_domains. Exception: envelope recipients are
	left alone, in order to not screw up routing.

19981015

	Code cleanup: moved the recipient duplicate filter from
	the user-level sendmail posting agent to the semi-resident
	cleanup service, so that the filter operates on the output
	from address canonicalization and of virtual expansion,
	instead of operating on their inputs.

19981016

	Bugfix: after kill()ing a bunch of child processes, wait()
	sometimes fails before all children have been reaped, and
	must be called again, or the master will SIGSEGV later.
	Problem reported by Scott Cotton.

	Workaround: don't log a complaint when an SMTP client goes
	away without sending QUIT.

19981018

	Workaround: Solaris 2.5 ioctl SIOCGIFCONF returns a hard
	error (EINVAL) when the result buffer is not large enough.
	This can happen on systems with many real or virtual
	interfaces. File: util/inet_addr_local.c. Problem reported
	by Scott Cotton.

	Workaround: the optional HELO/EHLO hostname syntax check
	now allows a single trailing dot.

	Workaround: with UNIX-domain sockets, LINUX connect() blocks
	until the server calls accept(). File: qmgr/qmgr_transport.c.
	Terry Lorrah and Scott Cotton provided the necessary
	evidence.

19981020

	Robustness: recursive canonical mapping terminates when
	the result stops changing.

	Code cleanup: reorganized the address rewriting and mapping
	code in the cleanup service, to make it easier to implement
	the previous enhancement.

19981022

	Code cleanup: more general queue scanning programming
	interface, in preparation for hashed queues. File:
	qmgr/qmgr_scan.c.

	Bugfix: a non-FIFO server with a process limit of 1 has a
	too short listen queue.  Until now this was not a problem
	because only FIFO servers had a process limit of 1, and
	FIFOs have no listen queue.  Fix: always configure a listen
	queue of proc_limit or more.  File: master/master_listen.c.

19981023

	Feature: by popular request, mail delay is logged when
	delivering, bouncing or deferring mail.

19981024

	Cleanup: double-bounce mail is now absorbed by the queue
	manager, instead of the local delivery agent, so that the
	mail system will not go mad when no local delivery agent
	is configured.

19981025

	Cleanup: moved the relocated table from the local delivery
	agent to the queue manager, so that the table can also be
	used for virtual addresses.

	Code reorg: in order for the queue manager to absorb
	recipients, the queue file has to stay open until all
	recipients have been assigned to a destination queue.

19981026

	vmlogger command, so that vmailer-script logging becomes
	consistent with the rest of the VMailer system.

	Code reorg: logger interface now can handle multiple output
	handlers (e.g. syslog and stderr stream).

	Bugfix: a first line starting with whitespace is no longer
	treated as an extension of our own Received: header. Files:
	smtpd/smtpd.c, pickup/pickup.c.

19981027

	Bugfix: the bang-path swapping code went into a loop on an
	address consisting of just a single !. Eilon Gishri had
	the privilege of finding this one.

	Workaround: the non-blocking UNIX-domain socket connect is
	now enabled only on systems that need it. It may cause
	kernel trouble on Solaris 2.x.

	Bugfix: the resolver didn't implement bangpath swapping,
	so that mail for site!user@mydomain would be delivered to
	a local user named "site!user".

19981028

	Cleanup: a VSTREAM can now use different file descriptors
	for reading and writing. This was necessary to prevent
	"sendmail -bs" and showq from writing to stdin. Eilon Gishri
	observed the problem.

19981029

	The RFC 822 address manipulation routines no longer give
	special attention to 8-bit data. Files: global/tok822_parse.c,
	global/quote_822_local.c.

	Bugfix: host:port and other non-domain stuff is no longer
	allowed in mail addresses.  File: qmgr/qmgr_message.c.

	Workaround: LINUX accept() wakes up before the three-way
	handshake is complete, so it can fail with ECONNRESET.
	Files: master/single_server.c, master/multi_server.c.

	Feature: when delivering to user+foo, try ~user/.forward+foo
	before trying ~user/.forward.

	Bugfix: smtpd in "sendmail -bs" (stand-alone) mode didn't
	clean up when terminated by a signal.

	Bugfix: smtpd in "sendmail -bs" (stand-alone) mode should
	not try to enforce spam controls because it cannot access
	the address rewriting machinery.

	Cleanup: the percent hack (user%domain -> user@domain) is
	now configurable (allow_percent_hack, default: yes).

	Bugfix: daemons in -S (stand-alone) mode didn't change
	directory to the queue. This was no problem with daemons
	run by the sendmail compatibility program.

19981030

	Feature: when virtual/canonical/relocated lookup fails for
	an address that contains the optional recipient delimiter
	(e.g., user+foo@domain), the search is done again with the
	unextended address (e.g., user@domain). File: global/addr_find.c.

	Code reorg: the address searching is now implemented by a
	separate module global/addr_find.c, so that the same code
	can be used for both (non-mapping) relocated table lookups
	and for canonical and virtual mapping. The actual mapping
	is still done in the global/addr_map.c module.

	Robustness: the SMTP client now skips hosts that don't send
	greeting banner text. File: smtp/smtp_connect.c

	Feature: preliminary support to disable delivered-to. This
	is desirable for mailing list managers that don't want to
	advertise internal aliases.

	Generic support: when the recipient_feature_delimiter
	configuration parameter is set, the local delivery agent
	uses it to split the recipient localpart into fields. Any
	field that has a known name such as "nodelivered" enables
	the corresponding delivery feature.

19981031

	Code reorg: address splitting on recipient delimiter is
	now centralized in global/split_addr.c, which knows about
	all reserved names that should never be split.

	Robustness: when a request for an internal service cannot
	be satisfied because the master has terminated, terminate
	instead of trying to reach the service every 30 seconds.

	Safety: the local delivery agent now runs as vmailer most
	of the time, just like pickup and pipe. Files: local/local.c,
	local/mailbox.c

19981101

	Compatibility: the tokenizer for alias/forward/etc.
	expansion now updates an optional counter with the number
	of destinations found; If no destinations is found in a
	.forward file, deliver to the mailbox instead. Thanks,
	Daniel Eisenbud, for showing the way to go.

	Robustness: the pickup daemon should always include a
	posting-time record, even when the sendmail posting agent
	didn't. However, just like before, user-provided posting
	times will be ignored. Ollivier Robert found this one.

	Robustness: duplicate entries in aliases or maps now cause
	a warning instead of a fatal error (and an incomplete file).

	Robustness: mkmap now prints a warning when an entry is in
	"key: value" format, which is the format expected for alias
	databases, not for maps.

	Portability: on LINUX, prepend "+" to the getopt() options
	string so that getopt() will stop at the first non-option
	argument. Suggestion by Marco d'Itri.

19981103

	Cleaned up the set_eugid() and open_as() implementations,
	and added stat_as() and fstat_as() so that the local delivery
	agent would look up include files and .forward files with
	the right privileges.

19981104

	Bugfix: the :include: routine now stat()s/open()s files
	included by root-owned aliases as root, not as nobody.

	Bugfix: the master crashed when a service with wakeup timer
	was disabled or renamed.  Fix: eliminate some pathological
	coupling between process management and wakeup management.

	Feature: partial implementation of ETRN (causes a full
	deferred queue scan). Thanks Lamont Jones for reminding me
	that things can be useful already before they are perfect.

	Cleanup: simplified the SMTPD tokenizer.

	Bugfix: sendmail -bs didn't properly notify the mail system
	of new mail.

	Compatibility: the MAIL FROM and RCPT TO commands now accept
	the most common address forms without enclosing <>. The <>
	is still needed for addresses that contain a "string", an
	[address], or a colon (:).

19981105

	Bugfix: "master -t" would claim that the master runs when
	in fact the pid directory does not exist, causing trouble
	with first time startup (reported by several).

	Portability: added a sane_accept() module that maps all
	beneficial accept() error results to EAGAIN. According to
	private communication with Alan Cox, Linux 2.0.x accept()
	can return a variety of error conditions, so we play safe
	and allow for any error that may happen because SYN+ACK
	could not be sent.

	Portability: NETBSD1 uses dotlock files (Perry Metzger).

	Bugfix: the local delivery agent did not canonicalize
	owner-foo sender addresses, so that local users would see
	owner-foo instead of owner-foo@$myorigin (Perry Metzger).

	OPENSTEP4 support, similar to NEXTSTEP3 (Gerben Wierda).

19981106

	Portability: the master startup would take a long time on
	AIX because AIX has a very large per-process open file
	limit.  Fix is to check the status of only the first couple
	hundred file descriptors instead. File: master/master.c.

	Bugfix: mail to user@[net.work.addr.ess] was broken because
	of a reversed test. File: qmgr/qmgr_message.c.

19981107

	Compatibility: don't clobber the envelope sender address
	when an alias has no owner-foo alias (problem diagnosed by
	Christophe Kalt).

	Bugfix: mail to local users in include files would be
	delivered directly if the alias didn't have an owner-foo
	alias, and if the alias database and include file were
	owned by root.

	Feature: with user+foo addresses, any +foo address extension
	that is not explicitly matched in canonical, virtual or
	alias databases is propagated to the table lookup result.

19981108

	Bugfix: minor memory leak in the user+foo table lookup
	code.

	Configurability: specify virtual.domain in the virtual map,
	and mail for unknown@virtual.domain will bounce automatically.
	The $relay_domains default value now includes $virtual_maps,
	so the SMTP server will accept mail for the domain. Marco
	d'Itri put me on the right track.

	Configurability: The mydestinations configuration parameter
	now accepts /file/name expressions and type:name lookup
	tables.

	Code cleanup: in order to make the previous two enhancements
	possible, revised the string/host/address matching engine
	so it can handle any mixture of strings, /file/name patterns
	and type:name lookup tables. Files: util/match_{list,ops}.c,
	global/{domain,namadr,string}_list.c.

19981110

	Code cleanup: replaced remaining isxxx() calls by ISXXX().

19981111

	Bugfix: the "bounce unknown virtual user" code was in the
	wrong place. Problem tackled with help of Chip Christian.

	Portability: reportedly, Solaris 2.5.1 can hang waiting
	for a UNIX-domain connection to be accepted, so it gets
	the same workaround that was designed for LINUX. Problem
	reported by Scott Cotton.

19981112

	Management: "vmailer stop" now allows delivery agents to
	finish what they are doing, like "vmailer reload".

	Management; "vmailer abort" causes immediate termination.

	Workaround: zombie processes pile up with HP-UX. Reason:
	select() does not return upon SIGCHLD when SA_RESTART is
	specified to sigaction(). Workaround: shorten the select()
	timer to 10 seconds, #ifdef BRAINDEAD_SELECT_RESTARTS.
	Thanks, Lamont Jones.

19981117

	Rename: VMailer is now Postfix. Sigh.

19981118

	Cleanup: generalized the safe_open() routine so that it is
	no longer limited to mailbox files, lock files, etc.

	Bugfix (found during code review): vstream*printf() could
	run off the end of a stream buffer after an I/O error,
	because vbuf_print() ignored the result from VBUF_SPACE().

	Bugfix (found during code review): resolve_local() could
	clobber its argument, but the docs didn't say so.

19981121

	Cleanup: the is_header() routine now allows 8-bit data in
	header labels.

19981123

	Bugfix (found during code review): the mail_queue_enter()
	path argument wasn't optional.  File: global/mail_queue.c

19981124

	Cleanup: eliminated redundant tests for a zero result from
	vstream_fdopen(). Unlike the stdio fdopen() routine, the
	vstream_fdopen() routine either succeeds or never returns.

	Bugfix: the queue manager now looks at the clock before
	examining a file time stamp, to avoid spurious complaints
	about time warps on busy machines. File:  qmgr/qmgr_active.c.

19981125

	Compatibility: allow trailing dot at the end of user@domain.
	Address canonicalization now strips it off. Issue brought
	forward by Eilon Gishri. File: trivial-rewrite/rewrite.c.

	Robustness: changed DNS lookup order of MAIL FROM etc.
	domains from MX then A to A then MX, just in case the MX
	lookup fails with a server error.

	Renamed vmcat, vmlock, vmlogger, vmtrigger to postcat,
	postlock, postlog, postkick. Also renamed mkmap and mkalias
	to postmap and postalias.

19981126

	Workaround: Lamont Jones found a way for HP-UX to terminate
	select() after SIGCHLD. The code is #ifdef USE_SIG_RETURN.
	Files:  util/sys_defs.h, master/master_sig.c.

	Bugfix: the Delivered-To: loop detection code had stopped
	working, when long ago the is_header() routine was changed.
	File: local/delivered.c.

19981128

	Bugfix: postcat opened queue files read-write, where only
	read access was needed. File: postcat/postcat.c.

19981129

	Safety: added a sleep(1) to all fatal and panic exits.
	File: util/msg.c.

19981201

	Robustness: postcat now insists that a file starts with a
	time record.

	Consistency: added "-c config_dir" command-line options
	where appropriate.

19981202

	Man pages, on-line version.

19981203

	Man pages, html version; overview documentation.

19981206

	Sendmail silently accepted the unsupported -qRsite and
	-qSsite options.  It now prints an error message and
	terminates.

	Separated the contributed tree from the IBM code; moved
	the LDAP and NEXTSTEP/OPENSTEP code to the contributed
	source tree because obviously I didn't write it.

19981206-9

	Had to write a postconf configuration utility in order to
	reliably find out about all configuration parameters and
	their defaults.

	Documentation bugfixes by Matt Shibla, Scott Drassinower,
	Greg A. Woods.

19981209

	On machines with short hostnames, postconf -d cored while
	reporting a fatal error. It should not report that error
	in the first place. Thanks, Eilon Gishri.

	Changed the FAQ entry about rejecting mail for *.my.domain
	on a firewall. Chip Christian was right, I was wrong.

19981214

	Portability: with GNU getopt, optind is not initially 1,
	breaking an assumption in sendmail/sendmail.c. Liviu Daia.

	Annoyance: on non-networked systems, don't warn that only
	one network interface was found. File:  global/inet_addr_local.c.
	Reported by several.

	Bugfix: on non-networked systems, the smtp client assumed
	that it was running in virtual host mode, and would bind
	to the loopback interface. File smtp/smtp_connect.c.  Liviu
	Daia, again.

19981220

	Robustness: when looking up an A or MX record, do not give
	up when the A query fails because of a server error.  File
	dns/dns_lookup.c. Reported by Scott Drassinower.

19981221

	Bugfix: "bounce mail for non-existent virtual user" didn't
	work when a non-default relay host was configured in main.cf
	or in the transport table. File: qmgr/qmgr_message.c.

	Bugfix: the maildrop directory should not be world-readable.
	Files: conf/postfix-script, showq/showq.c.

	Documentation: fixed several omissions and errors.

	Documentation: removed references to the broken recipient
	feature delimiter configuration parameter.

	Bugfix: write mailbox file as the recipient, so that file
	quota work as expected.

	Bugfix: pickup would die when it tried to remove a non-file
	in the maildrop directory (Jeff Wolfe).

19981222

	Sendmail no longer logs the queue ID when it is unable to
	notify the pickup daemon. This is a late addition to the
	"unreadable maildrop queue" patch.

	user.lock files are now created as root, so that postfix
	needs no group directory write permission.

19981224

	Security: allow queue file link counts > 1, to avoid
	non-delivery of maildrop files with links to a non-maildrop
	directory.  Files:  global/mail_open_ok.c, and anything
	that calls this code (qmgr, pickup, showq). If multiple
	hard links are a problem, see the set-gid "postdrop" utility
	below.

19981225

	Robustness: the queue manager no longer aborts when a queue
	file suddenly disappears (e.g. because the file was removed
	by hand).

	Feature: when a writable maildrop directory is a problem,
	sites can make the new "postdrop" utility set-gid. This
	command is never used when the maildrop directory is
	world-writable.

	Robustness: make the queue file creation routine more
	resistant against denial of service race attack. File:
	global/mail_queue.c

19981226

	New suid_priv module to enable/disable privileges in a
	set-uid/gid program. In the end I decided to not use it.

19981228

	Robustness: make the pickup daemon more resistant against
	non-file race attack.

	Cleanup: generic mail_stream.c interface for writing queue
	file streams to files, daemons or commands. This simplifies
	the code in smtpd and in sendmail that must be able to pipe
	mail through the postdrop command. The cleanup daemon has
	been modified to use the same interface. Result: less code.

	Feature: smtpd now logs the only recipient in Received:
	headers.

	Feature: separate command and daemon directories. Both
	default to $program_directory. Install conf/postfix-script
	if you want to use this feature.

19981230

	Patch to avoid conflict with non-writable top-level Makefile
	(Lamont Jones).

19981231

	Portability: port to UnixWare 7 by Ronald Joe Record, SCO.

19990104

	Bugfix: fencepost (Jon Ribbens, Oaktree Internet Solutions
	Ltd.) Files: quote_82[12]_local.c.

	Bugfix: wrong default for relay_domains (Juergen Kirschbaum,
	Bayerische Landesbank). File: mail_params.h.

	Bugfix: changed 5xx response for "too may recipients" to
	4xx. File: smtpd.c.

19990106

	Feature: defer_transports specifies the names of transports
	that should be used only when "sendmail -q" (or equivalent)
	is issued. For example, "defer_transports = smtp" is useful
	for sites that are disconnected most of the time. File:
	qmgr_message.c.

19990107

	Feature: local_command_shell specifies a non-default shell
	for delivery to command by the local delivery agent. For
	example, "local_command_shell = /some/where/smrsh -c"
	restricts what may appear in "|command" destinations.
	File: global/pipe_command.c.

19990112-16

	Feature: SMTP command pipelining support based on an initial
	version by Jon Ribbens, Oaktree Internet Solutions Ltd.
	This one took several days of massaging before I felt
	comfortable about it. Files: smtp.c, smtp_proto.c.

	Bugfix: the SMTP server would flush responses one-by-one,
	which caused suboptimal performance with pipelined clients.
	The vstream routines now flush the write buffer when the
	read() routine is called, instead of flushing when the
	application changes from writing to reading. Delayed flush
	prevents the SMTP server from flushing responses one-by-one
	and thus triggering Nagle's algorithm. File: util/vstream.c.

19990117

	Bugfixes and enhancements to the smtpstone tools by Drew
	Derbyshire, Kendra Electronic Wonderworks: send helo command,
	send message headers, format the message content to lines
	< 80, work around NT stacks, make "." recognition more
	robust. Files: smtp-source.c, smtp-sink.c.

	Strategy: look at the deferred queue only when the incoming
	queue is empty; limit the number of recipients read from
	a queue file depending on the number of recipients already
	in core. Files: qmgr.c, qmgr_message.c.

	Feature: postponed anti-UCE restrictions. The decision to
	reject junk mail on the basis of the client name/address,
	HELO hostname or sender address can now be postponed until
	the RCPT TO command (or HELO or MAIL FROM if you like).
	File: smtpd_check.c.

19990118

	Feature: incremental updates of alias databases and of
	other lookup tables. Both postalias and postmap now take
	a -i option for incremental updates from standard input.
	Files: global/mkmap_*.c, post{map,alias}/post{map,alias}.c.

	Compatibility: newaliases can now update multiple alias
	databases: list them in the "alias_database" parameter in
	main.cf. By the same token, postalias can now update multiple
	maps in one command. Files:  post{map,alias}/post{map,alias}.c

	Feature: mail to <> is now sent to the address specified
	with the "empty_address_recipient" configuration parameter
	which defaults to MAILER-DAEMON (idea by Lamont Jones,
	Hewlett-Packard). File: cleanup/cleanup_envelope.c.

	Compatibility: the transport table now uses .domain.name
	to match subdomains, just like sendmail mailer tables (patch
	by Lamont Jones, Hewlett-Packard).

	Feature: mailq now ends with a total queue size summary
	(Eilon Gishri, Israel Inter University Computation Center).

19990119

	Feature: address masquerade exceptions for user names listed
	in the "masquerade_exceptions" configuration parameter.
	File: cleanup/cleanup_masquerade.c.

	Feature: qmail-style maildir support, based on initial code
	by Kevin W. Brown, Quantum Internet Services Inc.

	Workaround: Solaris 2.something connect() fails with
	ECONNREFUSED when the system is busy (Chris Cappuccio,
	Empire Net). File: global/mail_connect.c.

	Feature: the cleanup service now adds a Return-Path: header
	when none is present. This header is needed for some mail
	delivery programs (see below). File: cleanup_message.c.

	Feature: the pipe mailer now supports $user, $extension
	and $mailbox macros in command-line expansions. This, plus
	the Return-Path: header (see above), should be sufficient
	to support cyrus IMAP out of the box. Based on  initial
	code by Joerg Henne, Cogito Informationssysteme GMBH.
	File: pipe/pipe.c.

	Bugfix: with address extensions enabled, canonical and
	virtual lookups now are done in the proper order:
	user+foo@domain, user@domain, user+foo, user, @domain.
	File: global/mail_addr_find.c.

19990119

	Feature: the local mailer now prepends a Received: message
	header with the queue ID to forwarded mail, in order to
	make message tracing easier.  File: local/forward.c.

	Cleanup: after "postfix reload", no more broken pipe
	complaints from resolve/rewrite clients.

19990121

	Feature: pickup (again) logs uid and sender address.  On
	repeated request by Scott Cotton, Internet Consultants
	Group, Inc.

	Portability: doze() function for systems without usleep().

	Cleanup: clients are now consistently logged as host[address].

19990122

	Maildir support changed: specify "home_mailbox = Maildir/".
	The magic is the trailing /. Suggested by Daniel Eisenbud,
	University of California at Berkeley.

	Maildir support from aliases, :include: and .forward files.
	Specify /file/name/ - the trailing / is required. Suggested
	by Daniel Eisenbud, University of California at Berkeley.

	Workaround: watchdog timer to prevent the queue manager
	from locking up on some systems.

	Bugfix: in Received: headers, the "for <recipient>"
	information was in the wrong place. Pointed out by Jon
	Ribbens, Oaktree Internet Solutions Ltd.

19990124

	Portability: more workarounds for GNU getopt() by Liviu
	Daia, Institute of Mathematics, Romanian Academy. File:
	sendmail/sendmail.c.

19990125

	Bugfix: Postfix should not masquerade recipient addresses
	extracted from message headers. Problem reported by David
	Blacka, Network Solutions. File: cleanup/cleanup_message.c.

19990126

	Feature: smtpd_etrn_restrictions parameter to restrict who
	may use ETRN and what domains may be specified.  Example:
	"smtpd_etrn_restrictions = permit_mynetworks, reject".
	Requested by Jon Ribbens, Oaktree Internet Solutions Ltd.
	File: smtpd/smtpd_check.c.

19990127

	Bugfix: in an attempt to shave some cycles, the anti junk
	mail routines would use the wrong resolved address. This
	"optimization" is now turned off. Problem reported by Sam
	Eaton, Pavilion Internet Plc. File: smtpd/smtpd_check.c.

	Feature: BIFF notifications.  For compatibility reasons
	this feature is on by default.  This "protocol" can be a
	real performance pig.  Specify "biff = no" in main.cf if
	your machine has lots of shell users. Feature requested by
	Dan Farmer - it's one of the things one does for friends.
	Files:  local/mailbox.c, local/biff_notify.c.

	Bugfix: another case sensitivity problem, this time with
	virtual lookups to recognize unknown@virtual.domain.
	Problem reported by Bo Kleve, Linkoping University. File:
	qmgr/qmgr_message.c.

19990128

	Feature: with "soft_bounce = yes", defer delivery instead
	of bouncing mail. This is a safety net for configuration
	errors with delivery agents. It has no effect on errors in
	virtual maps, canonical maps, or in junk mail restrictions.
	Feature requested by Bennett Todd. File: global/bounce.c.

19990129

	Compatibility: the qmail maildir.5 documentation prescribes
	maildir file names of the form time.pid.hostname, which is
	wrong because Postfix processes perform multiple deliveries.
	Elsewhere the qmail author has documented how maildir files
	should be named under such conditions. Postfix has been
	changed to be conformant. File: local/maildir.c.

19990131

	Feature: special treatment of owner-foo and foo-request
	can be turned off. Specify "owner_request_special = no".
	Requested by Matthew Green and others. Files: local/alias.c,
	global/split_addr.c. This affects canonical, virtual and
	alias lookups.

19990204

	Portability: signal handling for HP-UX 9 by Lamont Jones
	of Hewlett Packard. File: master/master_sig.c.

	Robustness: disable random walk inside a per-site queue to
	avoid message starvation under heavy load. File: qmgr_entry.c.

	Robustness: under some conditions the queue manager could
	declare a host dead after just one delivery failure.  File:
	qmgr_queue.c.

19990212

	Feature: skip SMTP servers that greet us with a 4XX status
	code. Example: "smtp_skip_4xx_greeting = yes". By default,
	the Postfix SMTP client defers delivery when a server
	declines talking to us. File:  smtp/smtp_connect.c.

	Robustness: upon startup the queue manager now moves active
	queue files to the incoming queue instead of the deferred
	queue, to avoid anomalous delivery delays on systems that
	have a huge incoming queue.  Files: qmgr/qmgr.c,
	qmgr/qmgr_active.c, global/mail_flush.c, conf/postfix-script*

19990213

	Robustness: added watchdog timers to avoid getting stuck
	on systems with broken select() socket implementations.
	File: qmgr_transport.c, qmgr_deliver.c.

19990218

	Feature: NFS-friendly delivery to mailbox by avoiding the
	use of root privileges as much as possible. With input by
	Mike Muus, Army Research Lab, USA.

	Feature: the smtp-sink test server now supports SMTP command
	pipelining. To this end we had to generalize the timer and
	vstream support. Poor performance is fixed 19990222.

	Cleanup: timer event routines now have the same interface
	as read/write event routines (event type + context). File:
	util/events.c.

	Feature: new vstream_peek() routine to tell how much unread
	data is left in a VSTREAM buffer. This is the vstream
	variant of the peekfd() routine for kernel read buffers.
	File: util/vstream.c.

	Feature: directory scanning support for hashed mail queue
	directories. So far the results are disappointing: with
	depth = 2 (16 directories with 16 subdirectories), mailq
	takes 5 seconds with an empty queue unless all directories
	happen to be cached in memory.  We need a bit map before
	hashed queue directories become practical. Depth=1 hashing
	doesn't slow down mailq much, but doesn't help much either.
	Files: util/scan_dir.c, global/mail_scan_dir.c.

19990221

	Workaround: with "ignore_mx_lookup_error = yes", the SMTP
	client always performs an A lookup when an MX lookup could
	not be completed, rather than treating MX lookup failure
	as a temporary error condition.  Unfortunately there are
	many broken DNS servers on the Internet. File: smtp/smtp_addr.c.

19990222

	Performance: rewrote the guts of the smtp-sink test server
	so it can do pipelining without losing performance.

19990223

	Workaround: hotmail.com sometimes drops the connection
	after "." (causing misleading diagnostics to be logged) or
	waits minutes after receiving QUIT. Solution: do not wait
	for the response to QUIT. File: smtp/smtp_proto.c.  This
	is turned off with: "smtp_skip_quit_response = no".

19990224

	Feature: the pipe mailer accepts user=username:groupname,
	based on code submitted by Philip A. Prindeville, Mirapoint,
	Inc., USA.  File: pipe/pipe.c.

	Workaround: use file locking to prevent multiple processes
	from select()ing on the same socket. This causes performance
	problems on large BSD systems. Files: master/*_server.c.

19990225

	Bugfix: with "inet_interfaces = 127.0.0.1", don't bind to
	the loopback interface. Problem reported by Steve Bellovin
	of AT&T. File: smtp/smtp_addr.c.

	Feature: "postsuper" command to remove stale queue files
	to update queues after changes to the queue structure
	parameters (hash_queue_names, hash_queue_depth). This
	command is to be run from the postfix-script maintenance
	shell script.

19990301

	Feature: new postconf -h (suppress `name = ' in output)
	option to make the program easier to use in, e.g., shell
	scripts.

	Feature: dict_unix module so you can add the UNIX passwd
	table to the SMTPD access control list.

19990302

	Feature: "luser_relay = destination" captures mail for
	non-existent local recipients. This works only when the
	local delivery agent does mailbox delivery (including
	delivery via mailbox_command), not when mailbox delivery
	is delegated to another message transport.

	Feature: new reject_non_fqdn_{hostname,sender,recipient}
	restrictions to require fully.qualified.domain forms in
	HELO, MAIL FROM and RCPT TO commands (while still allowing
	the <> sender address).

19990304

	Bugfix: backed out the 19990119 change to always insert
	Return-Path:  if that header is not present. The pipe and
	local agents now are responsible for prepending Return-Path:.
	Files:  cleanup/cleanup_message.c, global/mail_copy.[hc],
	pipe/pipe.c, global/header_opts.c.  This causes an incompatible
	change to the pipe flags parameter, because Return-Path:
	now must be requested explicitly.

19990305

	Bugfix: showq (the mailq server) incorrectly assumed that
	all recipients of a deferred message are listed in the
	corresponding defer logfile. It now lists all recipients.
	Files: showq/showq.c, cleanup/cleanup_envelope.c (ensure
	that sender records always precede recipient records).

	Cleanup: smtpd HELO restrictions validate [numerical] forms.
	Files: util/valid_hostname.c, smtpd/smtpd_check.c.  Initial
	code by Philip A. Prindeville, Mirapoint, Inc., USA.

19990306

	Cleanup: re-vamped the valid_hostname module, and added a
	maximal label length (63) requirement.

	Feature: fallback_relay parameter to specify extra backup
	hosts in case the regular relay hosts are not found or not
	available.  Files:  smtp/smtp_addr.c.

	Feature: "always_bcc = address" specifies where to send a
	copy of each message that enters he system. However, if
	that copy bounces, the sender will be informed of the
	bounce. Files: smtpd/smtpd.c, pickup/pickup.c

	Compatibility: the transport map will now route on top-level
	domains, so you can dump all of .bitnet to a bitnet relay.

19990307

	Feature: LDAP lookups, updated by Jon Hensley, Merit Network,
	USA.

	Feature: regular expression (PCRE) support by Andrew
	McNamara, connect.com.au Pty. Ltd., Australia. In order to
	use this code specify pcre:/file/name. You can use this
	anywhere you would use a DB or DBM file, NIS or LDAP.  See:
	PCRE_README for how to enable this code.

	Feature: "delay_warning_time = 4" causes Postfix to send
	a "your mail is delayed" notice after approx. 4 hours.
	Daniel Eisenbud, University of California at Berkeley.
	Files:  qmgr/qmgr_active.c, qmgr/qmgr_message. Postmaster
	notices for delayed mail are disabled by default. In order
	to receive postmaster notices, specify "notify_classes =
	...  delay ...".

	Cleanup: do not send undeliverable bounced mail to postmaster.
	This was causing lots of pain with junk mail from bogus
	sender addresses to non-existent recipients.  This change
	was reversed 19990311.

19990308

	Bugfix: the dotforward routine was too eager with throwing
	away extension information, so that the Delivered-To: info
	would differ for \mailbox and |command. Problem reported
	by Rafi Sadowski, Open University, Israel.

	Bugfix: seems I never got around to fix the btree access
	method. I finally did. Problem reported by: Matt Smith,
	AvTel Communications Inc., USA.

19990311

	Back by popular demand: with "notify_classes = 2bounce ..."
	Postfix will send undeliverable bounced mail to postmaster.
	The default is to not send double bounces.  This change
	reverses a change made on 19990307.

19990312

	Feature: configurable exit handler for server skeletons.
	Philip A.  Prindeville, Mirapoint, Inc., USA. Files:
	master/*server.c.

	Feature: mail_spool_directory configuration parameter to
	specify the UNIX mail spool directory.  The default setting
	is system dependent.

19990313

	Cleanup: share file descriptors for resolve and rewrite
	client connections. This puts less strain on the trivial-rewrite
	service.

	Portability: support for UnixWare 2.1 by Dmitry E. Kiselyov,
	Nizhny Novgorod City Health Emergency Station.

	Feature: configurable delays in the smtpstone test programs.
	With input by Philip A.  Prindeville, Mirapoint, Inc., USA.
	Files:  smtpstone/*.c.

	Bugfix: a "signal 11" problem in the trivial-rewrite program
	that would occasionally happen after "postfix reload".
	Reason: some rewrite clients would clobber their input,
	and when they had to retransmit the query, the input would
	be a zero-length string, which trivial-rewrite isn't supposed
	to receive.

19990314

	Feature: "mailbox_transport = cyrus" delegates all local
	mailbox delivery to a master.cf entry called "cyrus" (the
	same trick for procmail), including users not found in the
	UNIX passwd database.  This gives the flexibility of $name
	expansions by the pipe mailer, without losing local aliases
	and ~/.forward processing.  Result of discussions with Rupa
	Schomaker, RS Consulting.

19990315

	Feature: the mydestination parameter can now be an empty
	string, for hosts that don't receive any mail locally. Be
	sure to specify a default route for mail that comes to the
	machine or mail will loop.

19990316

	Bugfix: the SMTPD check scaffolding didn't apply the same
	sanity checks as the production code. Problem reported by
	Alain Thivillon, Herve Schauer Consultants, France. File:
	smtpd/smtpd_check.c.

	Portability: some systems can have more than 59 seconds in
	a minute. Based on a fix by Liviu Daia, Institute of
	Mathematics, Romanian Academy.  File:  global/mail_date.c.

	Enhancement: include the client network address in the
	rejected by RBL response. Lamont Jones, Hewlett-Packard.

	Workaround: use fstat() to figure out if the maildrop is
	world-writable. access() uses the real uid, which stinks.

	Robustness: don't do partial address lookups (user@, domain,
	user, @domain) with regexp-style tables.

	Security: don't allow regexp-style tables to be used for
	aliases. It would be too easy to slip in "|command" or
	:include: or /file/name.

19990317

	Feature: "fallback_transport = cyrus" delegates non-UNIX
	recipients to a master.cf entry called "cyrus", allowing
	you to have both UNIX and non-UNIX mailboxes side by side.

19990319

	Workaround: on 4.4 BSD derivatives, fstat() can return
	EBADF on an open file descriptor. Now, that was a surprise.
	This caused std{out,err} from cron commands to not be
	delivered.

	Bugfix: "local -v" stopped working.

	Workaround: more watchdog timers for postfix-unfriendly
	systems. By now every Postfix daemon has one. Call it life
	insurance.

	Robustness: increased the maximal time to receive or deliver
	mail from $ipc_timeout (default: 3600 seconds) to the more
	generous $daemon_timeout (default: 18000 seconds). We don't
	want false alarms.

	Portability: IRIX 5.2 does not have usleep().

19990320

	Bugfix: \username was broken. Frank Dziuba was the first
	to notice.

19990321

	Workaround: from now on, Postfix on Solaris uses stream
	pipes instead of UNIX-domain sockets. Despite workarounds,
	the latter were causing more trouble than anything else on
	all systems combined.

19990322

	Portability: the makedefs would mis-identify IRIX 6.5.x as
	IRIX 5.x. Fix by Brian Truelsen of Maersk Mc-Kinney Moller
	Institute for Production Technology, Denmark.

	Feature: reject_unknown_recipient_domain restriction for
	recipient addresses. For the sake of symmetry, we now also
	have reject_unknown_sender_domain. This means the old
	reject_unknown_address restriction is being phased out.
	Suggested by Rask Ingemann Lambertsen, Denmark Technical
	University.

	Feature: unknown sender/recipient domain restrictions now
	distinguish between soft errors (always: 450) and hard
	errors (configurable with the unknown_address_reject_code
	parameter, default: 450; use 550 at your own risk).

	Feature: no HELO junk mail restrictions means that no syntax
	check will be done on HELO/EHLO hostname arguments.

	Bugfix: the initial Solaris workaround for UNIX-domain
	sockets could cause the queue manager to block if Postfix
	ran into a delivery agent process limit. After another code
	rewrite that problem is eliminated.  Thanks to Chris
	Cappuccio, Empire Net, for assistance with testing.

19990323

	Bugfix: too much forwarding when users list their own name
	in their .forward file (e.g. mail to user@localhost would
	go through .forward, would be forwarded to user@$myorigin,
	and would go through .forward again). Problem reported by
	Roman Dolejsi, Prague University of Economics.

19990324

	Bugfix: missing map name in check_xxx_access restrictions
	could cause a segmentation error. Lamont Jones, Hewlett-
	Packard.

	Feature: forward_path configuration parameter (default:
	$home/.forward$recipient_delimiter$extension,$home/.forward).
	Based on initial code by Philip A.  Prindeville, Mirapoint,
	Inc., USA.  Files:  local/dotforward.c.

19990325

	Workaround: Solaris NIS alias maps need special entries
	(YP_MASTER_NAME, YP_LAST_MODIFIED). What's worse, normal
	keys/values include a null byte at the end, but the YP_XXX
	ones don't. Problem reported by Walcir Fontanini, state
	university of Campinas, Brazil.  File: postalias/postalias.c.

	Compatibility: Solaris NIS apparently does include a null
	byte at the end of keys and values. File: util/sys_defs.h.

	Feature: library support for config parameters that are
	not $name expanded at program start-up. This was needed
	for forward_path, and will also be needed to make message
	headers customizable.

	Bugfix: pcre didn't handle \\ right. Lamont Jones, Hewlett-
	Packard. File: util/dict_pcre.c.

19990326

	Compatibility: Postfix now puts two spaces after the sender
	in a "From sender date..." header. Found by John A. Martin,
	fixed by Lamont Jones, Hewlett-Packard.

	Bugfix: when a recipient appeared multiple times in a local
	alias or include expansion, the delivery status could be
	left uninitialized, causing the mail to be deferred and
	delivered again. File: local/recipient.c.

19990327

	Cleanup: the dictionary routines now take an extra flag
	argument to control such things as warning about duplicates,
	and appending null bytes to key/value. The latter was needed
	for a clean implementation of NIS master alias maps support.

	Feature: POSIX regular expressions by Lamont Jones. See
	config/sample-regexp.c. Right now, enabled on *BSD and
	LINUX only.

19990328

	Code cleanup: dictionaries now have flags that say whether
	lookup keys are fixed strings or whether keys are subjected
	to pattern matching. This is needed to avoid passing partial
	addresses to regexp-based lookup tables (user, @domain,
	user@, domain). Files: util/dict*.c.

	Bugfix: fixed memory leaks and core dumps in the regexp
	and pcre routines (neither handled an empty pattern file).

19990329

	Code cleanup: the dictionary I/O routines now do their own
	locking depending on dictionary flag settings. This means
	that the low-level dict_get() interface can now be used
	for safe dictionary lookups. This is needed for 19990328's
	partial lookup key support. Files: util/dict*.c. global/maps.c.

	Feature: regular expression matches are no longer limited
	to user@domain address forms in access/canonical/virtual
	maps, but can also be used for domains in transport maps.
	This needed the partial lookup key support to avoid passing
	partial addresses to regexp-based lookup tables (user,
	@domain, user@, domain). Files: global/maps.c
	global/mail_addr_find.c.

	Feature: new dictionary types can be registered with
	dict_open_register(). File: util/dict_open.c.

19990330

	Bug fix: match_list membership dictionary lookups were case
	sensitive when they should not. Patch by Lutz Jaenicke,
	BTU Cottbus, Germany.

19990402

	Feature: $domain macro support in forward_path.  Philip A.
	Prindeville, Mirapoint, Inc., USA.  File:  local/dotforward.c.

	Feature: if an address extension (+foo) is explicitly
	matched by the .forward+foo file name, do not propagate
	the extension to recipient addresses. This is more consistent
	with the way aliases are expanded. File:  local/dotforward.c.

19990404

	Bugfix: after receiving mail, the SMTP server didn't reset
	the cleanup error flag, so that multiple deliveries over
	the same SMTP session could fail due to errors with previous
	deliveries. Found by Lamont Jones, Hewlett-Packard.

19990405

	Feature: MIME-encapsulated bounces. Philip A.  Prindeville,
	Mirapoint, Inc., USA.  File:  bounce/bounce_notify_service.c

	Cleanup: vstreams now properly look at the EOF flag before
	attempting to read, eliminating the need for typing Ctrl-D
	twice to test programs; the EOF flag is reset after each
	unget or seek operation.  Files: util/vstream.c, util/vbuf.c.

	Feature: in preparation for configurable message headers
	the mac_parse() routine now balances the parentheses in
	${name} or $(name). We need this in order to support
	conditional expressions such as ${name?text} where `text'
	contains other ${name} expressions.

19990406

	Cleanup: changed MIME header information to make bounces
	more RFC 1892 compliant.

19990407

	Feature: "best_mx_transport = local" delivers mail locally
	if the local machine is the best mail exchanger (by default,
	mail is bounced with a "mail loops back to myself" error).

	Config: in order to make feature tracking easier the source
	code distribution now has a copy of the default settings
	in conf/main.cf.default.

	Feature: separate configurable postmaster addresses for
	single bounces (bounce_notice_recipient), double bounces
	(2bounce_notice_recipient), delayed mail (delay_notice_recipient),
	and for other mailer errors (error_notice_recipient).  The
	default for all is "postmaster".

19990408

	Workaround: on Solaris 2.x, the master appears to lose its
	exclusive lock on the master.pid file, so keep grabbing
	the lock each time the master wakes up from select().

	Robustness: don't flush VSTREAM buffers after I/O error.
	This prevents surprises when calling vstream_fclose() after
	truncating a mailbox to its original size.

	Portability: on LINUX systems, if <db_185.h> exists, don't
	look for <db/db.h>.

	Workaround: specify "sun_mailtool_compatibility = yes" to
	avoid clashes with the mailtool application. This disables
	kernel locks on mailbox files. Use only where needed.

	Portability: renamed readline to readlline, to avoid clashes
	with mysql.

19990409

	Bugfix: ignore temp queue files that aren't old enough.
	Problem reported by Vivek Khera, Khera Communications, Inc.

	Bugfix: fixed typo in dict_db.c that caused processes to
	not release DB shared locks.

	Feature: auto-detection of changes to DB or DBM lookup
	tables.  This avoids the need to run "postfix reload" after
	change to the smtp access table and other tables.

	Feature: regular expression checks for message headers.
	This requires support for POSIX or for PCRE regular
	expressions.  Specify "header_checks = regexp:/file/name"
	or "header_checks = pcre:/file/name", and specify
	"/^header-name:  badstuff/ REJECT" in the pattern file
	(patterns are case-insensitive by default).  Code by Lamont
	Jones, Hewlett-Packard.  It is to be expected that full
	content filtering will be delegated to an external command.

19990410

	Bugfix: auto-detection of changes to DB or DBM lookup tables
	wasn't done for TCP connections.

19990410

	Feature: $recipient expansion in forward_path.  Philip A.
	Prindeville, Mirapoint, Inc., USA.  File: local/dotforward.c

	Feature: the smtp client consistently treats a numerical
	hostname as an address. File: smtp/smtp_addr.c.

19990414

	Compatibility: support comment lines starting with # in
	$mydestination include files. This makes Postfix more
	compatible with sendmail.cw files. File: util/match_list.c.

	Feature: if your machines have short host names, specify
	"mydomain = domain.name", and you no longer have to specify
	"myhostname = host.domain.name". Files:  global/mail_params.c,
	postconf/postconf.c.

19990420

	Cleanup: bounce mail when a mailbox goes over file quota,
	instead of deferring delivery.  File:  local/mailbox.c.

19990421

	Feature: auto-detection of changes to DB or DBM lookup
	tables now includes the case where a file is unlinked.
	Philip A.  Prindeville, Mirapoint, Inc., USA.  File:
	util/dict.c.

19990422

	Robustness: Lotus mail sends MAIL FROM: <@> instead of <>.
	Problem reported by Erik Toubro Nielsen, IFAD, Denmark.
	Files:  trivial-rewrite/rewrite.c (@ becomes empty address)
	and global/rewrite_clnt.c (allow empty response).

	Bugfix: showq could segfault when writing to a broken pipe.
	Problem reported by Bryan Fullerton, Canadian Broadcasting
	Corporation. Files: util/vbuf_print.c.

	Cleanup: got rid of the "fatal: write error: Broken pipe"
	message when mailq output is piped into a program that
	terminates early.

	Cleanup: bounce messages are multipart/mixed with the error
	report as part of the first message segment, because users
	had trouble extracting the delivery error report from the
	attachment.

19990423

	Cleanup: the default junk mail reject code is now 554
	(service unavailable) rather than 550 (user unknown).

	Folded in the updated dict_ldap.c module by John Hensley,
	Merit Network, USA.

	Folded in the vstream_popen.c updates by Philip A.
	Prindeville, Mirapoint, Inc., USA.  This copies a lot of
	code from pipe_command(); the next step is to trim that
	module.

19990425

	Workaround: renamed config.h to mail_conf.h etc. in order
	to avoid name collisions with LINUX (yes, they have a system
	include file called config.h). For compatibility with people
	who have written software for Postfix, there's a config.h
	that aliases the old names to the new ones. That file will
	go away eventually.

19990426

	Feature: error mailer, in order to easily bounce mail for
	specific destinations. In the transport table, specify:
	"host.domain    error:host.domain is unavailable". Too bad
	that the transport table triggers on destination domain
	only; it would be nice to bounce specific users as well.

19990427

	Cleanup: "disable_dns_lookups = yes" now should disable
	all DNS lookups by the SMTP client.

19990428

	Bugfix: with DBM files, Postfix was watching the "dir" file
	modification time for changes. It should be watching the
	"pag" file instead.

19990429

	Cleanup: all callbacks in the master to server API now pass
	on the service name and the application-specific argument
	vector. Files: master/*server.c.

19990504

	Feature: conditional macro expansion. ${name?text} expands
	to text when name is defined, otherwise the result is empty.
	${name:text} expands to text when name is undefined,
	otherwise the result is empty. File: util/mac_expand.c.

	Feature: conditional macro expansion of the forward_path
	configuration parameters of $user, $home, $shell, $recipient,
	$extension, $domain, $mailbox and $recipient_delimiter.
	Files:  local/dotforward.c, local/local_expand.c.

19990506

	Cleanup: eliminated misleading warnings about unknown HELO
	etc. SMTPD restrictions when the HELO etc. information is
	not available. File: smtpd/smtpd_check.c.

19990507

	Feature: all smtpd reject messages now contain the MAIL
	FROM and RCPT TO addresses, if available.

19990508

	Feature: conditional macro expansion of the luser_relay
	configuration parameter. It is no longer possible to specify
	/file/name or "|command" destinations. File: local/unknown.c.

	Cleanup: changed the mac_parse interface so that the
	application callback routine can return status information.
	Updated the dict_regexp and dict_pcre modules accordingly.

	Cleanup: changed the mac_expand interface so that the caller
	provides an attribute lookup routine, instead of having to
	provide a copy of all attributes upfront. Files:
	util/mac_expand.c, local/local_expand.c.

	Feature: control over how address extensions are propagated
	to other addresses. By default, propagation of unmatched
	address extensions is now restricted to canonical and
	virtual mappings. Specify "propagate_unmatched_extensions
	= canonical, virtual, alias, forward, include" to restore
	previous behavior.

19990509

	Feature: USER, EXTENSION, DOMAIN, RECIPIENT (entire address)
	and MAILBOX (address localpart) environment variables are
	exported to shell commands (including mailbox_command).

	Feature: new command_expansion_filter parameter to control
	what characters may appear in message attributes that are
	exported via environment variables.

	Cleanup: SMTPD reject messages are more informative, and
	more complete sender/recipient information is logged for
	the local sysadmin.

19990510

	Bugfix: missing MIME header in postmaster bounce notices.
	Found by Samuel Tardieu, Ecole Nationale Superieure des
	Telecommunications, France.

	Feature: UCE restrictions are always delayed until RCPT
	TO, VRFY or ETRN. To change back to the default specify
	"smtpd_delay_reject = no" in /etc/postfix/main.cf.

	Bugfix: missing duplicate filter call. This caused too many
	deliveries when a user is listed multiple times in an alias.
	Reported by Hideyuki Suzuki, School of Engineering, University
	of Tokyo. Backed out on 19990512 because it caused problems.
	Fixed 19990513 but needs further study.

	Feature: it is now possible to move queue files back into
	the maildrop queue, so that they can benefit from changes
	in canonical and virtual mappings. In order to make this
	possible, some restrictions on queue file contents were
	relaxed. Files: pickup/pickup.c, cleanup/cleanup_extracted.c.

	Feature: made a start with integrating Joerg Henne's
	dictionary extensions to remove entries and to iterate over
	entries. That code is almost four months old by now.

19990511

	Feature: added a "undeliverable postmaster notification
	discarded" warning when mail is dropped on the floor.
	Requested by Michael Hasenstein, SuSE, Germany.

19990517

	Bugfix: reject_non_fqdn_sender/recipient would pass
	user@[ip_address] regardless of destination. Eric Cholet
	had the honor of suffering from this one.

19990527

	More SMTP client logging for easier debugging: the smtp
	client now logs hostname[ip.addr], and logs every failed
	attempt to reach an MX host, not just the last one.

19990601

	Bugfix: emit a blank line before a MIME boundary; the line
	is part of the boundary. File: bounce/bounce_notify_service.c.
	Wolfgang Segmuller, IBM Research.

19990610

	Bugfix: the "is this the loopback interface" test was
	broken.  Reported by Claus Fischer @microworld.com.  File:
	smtp/smtp_connect.c.

	Usability: added helpful warnings about restrictions that
	are being ignored after check_relay_domains, etc.

	Portability: Reliant Unix support by Gert-Jan Looy, Siemens,
	the Netherlands.

19990611

	Robustness: the postfix-script start-up procedure now
	detects a missing master program, avoiding misleading
	warnings that the mail system is already running.  Fix
	suggested by David E. Smith @technopagan.org.

	Portability: Mac OS X Server Port by Mark Miller @swoon.net.

	Feature: on systems that use dotlock files for mailbox
	locking, the local delivery agent now will attempt to use
	dotlock files when delivering to user-specified files.
	Dotlock files for user-specified destinations are created
	with the privileges of the user. For backwards compatibility,
	Postfix will attempt to create dotlocks for user-specified
	destinations only when the user has parent directory wri