release_notes

早期freebsd实现

8.5/8.5		93/07/23
	Serious bug: if you used a command line recipient that was unknown
		sendmail would not send a return message (it was treating
		everything as though it had an SMTP-style client that
		would do the return itself).  Problem noted by Josh Smith.
	Change "trymx" option in getcanonname() to ignore all MX data,
		even during a T_ANY query.  This actually didn't break
		anything, because the only time you called getcanonname
		with !trymx was if you already knew there were no MX
		records, but it is somewhat cleaner.  From Motonori
		Nakamura.
	Don't call getcanonname from getmxrr if you already know there
		are no DNS records matching the name.
	Fix a problem causing error messages to always include "The
		original message was received ... from localhost".
		The correct original host information is now included.
	Previous change to cf/sh/makeinfo.sh doesn't port to Ultrix (their
		version of "test" doesn't have the -x flag).  Change it
		to use -f instead.  From John Myers.
	CONFIG: 8.4 mistakenly set the default SMTP-style mailer to
		esmtp -- it should be smtp.
	CONFIG: send all relayed mail using confRELAY_MAILER (defaults
		to "relay" (a variant of "smtp") if MAILER(smtp) is used,
		else "suucp" if MAILER(uucp) is used, else "unknown");
		this cleans up the configs somewhat.  This fixes a serious
		problem that caused route-addrs to get mistaken as relays,
		pointed out by John Myers.  WARNING: this also causes
		the default on SMART_HOST to change from "suucp" to
		"relay" if you have MAILER(smtp) specified.

8.4/8.4		93/07/22
	Add option `w'.  If you receive a message that comes to you because
		you are the best (lowest preference) target of an MX, and
		you haven't explicitly recognized the source MX host in
		your .cf file, this option will cause you to try the target
		host directly (as if there were no MX for it at all).  If
		`w' is not set, this case is a configuration error.
		Beware: if `w' is set, senders may get bogus errors like
		"message timed out" or "host unknown" for problems that
		are really configuration errors.  This option is
		disrecommended, provided only for compatibility with
		UIUC sendmail.
	Fix a problem that caused the incoming socket to be left open
		when sendmail forks after the DATA command.  This caused
		calling systems to wait in FIN_WAIT_2 state until the
		entire list was processed and the child closed -- a
		potentially prodigious amount of time.  Problem noted
		by Neil Rickert.
	Fix problem (created in 6.64) that caused mail sent to multiple
		addresses, one of which was a bad address, to completely
		suppress the sending of the message.  This changes
		handling of EF_FATALERRS somewhat, and adds an
		EF_GLOBALERRS flag.  This also fixes a potential problem
		with duplicate error messages if there is a syntax error
		in the header of a message that isn't noticed until late
		in processing.  Original problem pointed out by Josh Smith
		of Harvey Mudd College.  This release includes quite a bit
		of dickering with error handling (see below).
	Back out SMTP transaction if MAIL gets nested 501 error.  This
		will only hurt already-broken software and should help
		humans.
	Fix a problem that broke aliases when neither NDBM nor NEWDB were
		compiled in.  It would never read the alias file.
	Repair unbalanced `)' and `>' (the "open" versions are already
		repaired).
	Logging of "done" in dropenvelope() was incorrect: it would
		log this even when the queue file still existed.  Change
		this to only log "done" (at log level 11) when the
		queue file is actually removed.  From John Myers.
	Log "lost connection" in server SMTP at log level 20 if there
		is no pending transaction.  Some senders just close the
		connection rather than sending QUIT.
	Fix a bug causing getmxrr to add a dot to the end of unqualified
		domains that do not have MX records -- this would cause
		the subsequent host name lookup to fail.  The problem
		only occurred if you had FEATURE(nocanonify) set.
		Problem noted by Rick McCarty of Texas Instruments.
	Fix invocation of setvbuf when passed a -X flag -- I had
		unwittingly used an ANSI C extension, and this caused
		core dumps on some machines.
	Diagnose self-destructive alias loops on RCPT as well as EXPN.
		Previously it just gave an empty send queue, which
		then gave either "Need RCPT (recipient)" at the DATA
		(confusing, since you had given an RCPT command which
		returned 250) or just dropped the email, depending on
		whether you were running VERBose mode.  Now it usually
		diagnoses this case as "aliasing/forwarding loop broken".
		Unfortunately, it still doesn't adequately diagnose
		some true error conditions.
	Add internal concept of "warning messages" using 6xx codes.
		These are not reported only to Postmaster.  Unbalanced
		parens, brackets, and quotes are printed as 653 codes.
		They are always mapped to 5xx codes before use in SMTP.
	Clean up error messages to tell both the actual address that
		failed and the alias they arose from.  This makes it
		somewhat easier to diagnose problems.  Difficulty noted
		by Motonori Nakamura.
	Fix a problem that inappropriately added a ctladdr to addresses
		that shouldn't have had one during a queue run.  This
		caused error messages to be handled differently during
		a queue run than a direct run.
	Don't print the qf name and line number if you get errors during
		the direct run of the queue from srvrsmtp -- this was
		just extra stuff for users to crawl through.
	Put command line flags on second line of pid file so you can
		auto-restart the daemon with all appropriate arguments.
		Use "kill `head -1 /etc/sendmail.pid`" to stop the
		daemon, and "eval `tail -1 /etc/sendmail.pid`" to
		restart it.
	Remove the ``setuid(getuid())'' in main -- this caused the
		IDENT daemon to screw up.  This required that I change
		HASSETEUID to HASSETREUID and complicate the mode
		changing somewhat because both Ultrix and SunOS seem
		to have a bug causing seteuid() to set the saved uid
		as well as the effective.  The program test/t_setreuid.c
		will test to see if your implementation of setreuid(2)
		is appropriately functional.
	The FallBackMX (option V) handling failed to properly identify
		fallback to yourself -- most of the code was there,
		but it wasn't being enabled.  Problem noted by Murray
		Kucherawy of the University of Waterloo.
	Change :include: open timeout from ETIMEDOUT to an internal
		code EOPENTIMEOUT; this avoids adding "during SmtpPhase
		with CurHostName" in error messages, which can be
		confusing.  Reported by Jonathan Kamens of OpenVision
		Technologies.
	Back out setpgrp (setpgid on POSIX systems) call to reset the
		process group id.  The original fix was to get around
		some problems with recalcitrant MUAs, but it breaks
		any call from a shell that creates a process group id
		different from the process id.  I could try to fix
		this by diddling the tty owner (using tcsetpgrp or
		equivalent) but this is too likely to break other
		things.
	Portability changes:
		Support -M as equivalent to -oM on Ultrix -- apparently
			DECnet calls sendmail with -MrDECnet -Ms<HOST> -bs
			instead of using standard flags.  Oh joy.  This
			behaviour reported by Jon Giltner of University
			of Colorado.
		SGI IRIX  -- this includes several changes that should
			help other strict ANSI compilers.
		SCO Unix -- from Murray Kucherawy of HookUp Communication
			Corporation.
		Solaris running the Sun C compiler (which despite the
			documentation apparently doesn't define
			__STDC__ by default).
		ConvexOS from Eric Schnoebelen of Convex.
		Sony NEWS workstations and Omron LUNA workstations from
			Motonori Nakamura.
	CONFIG: add confTRY_NULL_MX_LIST to set option `w'.
	CONFIG: delete `C' and `e' from default SMTP mailers flags;
		several people have made a good argument that this
		creates more problems than it solves (although this
		may prove painful in the short run).
	CONFIG: generalize all the relays to accept a "mailer:host"
		format.
	CONFIG: move local processing in ruleset 0 into a new ruleset
		98 (8 on old sendmail).  Domain literal [a.b.c.d]
		addresses are also passed through this ruleset.
	CONFIG: if neither SMART_HOST nor MAILER(smtp) were defined,
		internet-style addresses would "fall off the end" of
		ruleset zero and be interpreted as local -- however,
		the angle brackets confused the recursive call.
		These are now diagnosed as "Unrecognized host name".
	CONFIG: USENET rules weren't included in S0 because of a mistaken
		ifdef(`_MAILER_USENET_') instead of
		ifdef(`_MAILER_usenet_').  Problem found by Rein Tollevik
		of SINTEF RUNIT, Oslo.
	CONFIG: move up LOCAL_RULE_0 processing so that it happens very
		early in ruleset 0; this allows .mc authors to bypass
		things like the "short circuit" code for local addresses.
		Prompted by a comment by Bill Wisner of The Well.
	CONFIG: add confSMTP_MAILER to define the mailer used (smtp or
		esmtp) to send SMTP mail.  This allows you to default
		to esmtp but use a mailertable or other override to
		deal with broken servers.  This logic was pointed out
		to me by Bill Wisner.  Ditto for confLOCAL_MAILER.
	Changes to cf/sh/makeinfo.sh to make it portable to SVR4
		environments.  Ugly as sin.

8.3/8.3		93/07/13
	Fix setuid problems introduced in 8.2 that caused messages
		like "Cannot create qfXXXXXX: Invalid argument"
		or "Cannot reopen dfXXXXXX: Permission denied".  This
		involved a new compile flag "HASSETEUID" that takes
		the place of the old _POSIX_SAVED_IDS -- it turns out
		that the POSIX interface is broken enough to break
		some systems badly.  This includes some fixes for
		HP-UX.  Also fixes problems where the real uid is
		not reset properly on startup (from Neil Rickert).
	Fix a problem that caused timed out messages to not report the
		addresses that timed out.  Error messages are also more
		"user friendly".
	Drop required bandwidth on connections from 64 bytes/sec to
		16 bytes/sec.
	Further Solaris portability changes -- doesn't require the BSD
		compatibility library.  This also adds a new
		"HASGETDTABLESIZE" compile flag which can be used if
		you want to use getdtablesize(2) instead of sysconf(2).
		These are loosely based on changes from David Meyer at
		University of Oregon.  This now seems to work, at least
		for quick test cases.
	Fix a problem that can cause duplicate error messages to be
		sent if you are in SMTP, you send to multiple addresses,
		and at least one of those addresses is good and points
		to an account that has a .forward file (whew!).
	Fix a problem causing messages to be discarded if checkcompat()
		returned EX_TEMPFAIL (because it didn't properly mark
		the "to" address).  Problem noted by John Myers.
	Fix dfopen to return NULL if the open failed; I was depending
		on fdopen(-1) returning NULL, which isn't the case.  This
		isn't serious, but does result in wierd error diagnoses.
		From Michael Corrigan.
	CONFIG: add UUCP_MAX_SIZE M4 macro to set the maximum size of
		messages sent through UUCP-family mailers.  Suggested
		by Bill Wisner of The Well.
	CONFIG: if both MAILER(uucp) and MAILER(smtp) are specified,
		include a "uucp-dom" mailer that uses domain-style
		addressing.  Suggested by Bill Wisner.
	CONFIG: Add LOCAL_SHELL_FLAGS and LOCAL_SHELL_ARGS to match
		LOCAL_MAILER_FLAGS and LOCAL_MAILER_ARGS.  Suggested by
		Christophe Wolfhugel.
	CONFIG: Add OSTYPE(aix3).  From Christophe Wolfhugel.

8.2/8.2		93/07/11
	Don't drop out on config file parse errors in -bt mode.
	On older configuration files, assume option "l" (use Errors-To
		header) for back compatibility.  NOTE:  this DOES NOT
		imply an endorsement of the Errors-To: header in any way.
	Accept -x flag on AIX-3 as well as OSF/1.  Why, why, why???
	Don't log errors on EHLO -- it isn't a "real" error for an old
		SMTP server to give an error on this command, and
		logging it in the transcript can be confusing.  Fix
		from Bill Wisner.
	IRIX compatibility changes provided by Dan Rich
		<[e-mail]>.
	Solaris 2 compatibility changes.  Provided by Bob Cunningham
		<[e-mail]>, John Oleynick
		<[e-mail]>
	Debugging: -d17 was overloaded (hostsignature and usersmtp.c);
		move usersmtp (smtpinit and smtpmailfrom) to -d18 to
		match the other flags in that file.
	Flush transcript before fork in mailfile().  From Eric Wassenaar.
	Save h_errno in mci struct and improve error message display.
		Changes from Eric Wassenaar.
	Open /dev/null for the transcript if the create of the xf file
		failed; this avoids at least one possible null pointer
		reference in very wierd cases.  From Eric Wassenaar.
	Clean up statistics gathering; it was over-reporting because of
		forks.  From Eric Wassenaar.
	Fix problem that causes old Return-Path: line to override new
		Return-Path: line (conf.c needs H_FORCE to avoid
		re-using old value).  From Motonori Nakamura.
	Fix broken -m flag in K definition -- even if -m (match only)
		was specified, it would still replace the key with the
		value.  Noted by Rick McCarty of Texas Instruments.
	If the name server timed out over several days, no "timed out"
		message would ever be sent back.  The timeout code
		has been moved from markfailure() to dropenvelope()
		so that all such failures should be diagnosted.  Pointed
		out by Christophe Wolfhugel and others.
	Relax safefile() constraints: directories in an include