Don't install .cf files to /etc/mail directly at all; offer a message
about how to install them instead. Don't create /etc/mail/statistics.
Create mqueue dirs at install via MAKE_DIRS. Should fix PR pkg/20852.
Make sure SMRSH_CMDDIR gets to the compile defs. Fixes PR pkg/34513.
fixes by patch.)
While here, fix PR pkg/33821 by substituting pkgsrc's BINOWN, BINGRP, and
INSTALL definitions into the installed share/sendmail/cf/Makefile.
8.13.7/8.13.7 2006/06/14
A malformed MIME structure with many parts can cause sendmail to
crash while trying to send a mail due to a stack overflow,
e.g., if the stack size is limited (ulimit -s). This
happens because the recursion of the function mime8to7()
was not restricted. The function is called for MIME 8 to
7 bit conversion and also to enforce MaxMimeHeaderLength.
To work around this problem, recursive calls are limited to
a depth of MAXMIMENESTING (20); message content after this
limit is treated as opaque and is not checked further.
Problem noted by Frank Sheiness.
The changes to the I/O layer in 8.13.6 caused a regression for
SASL mechanisms that use the security layer, e.g.,
DIGEST-MD5. Problem noted by Robert Stampfli.
If a timeout occurs while reading a message (during the DATA phase)
a df file might have been left behind in the queue.
This was another side effect of the changes to the I/O
layer made in 8.13.6.
Several minor problems have been fixed that were found by a
Coverity scan of sendmail 8 as part of the NetBSD
distribution. See http://scan.coverity.com/
Note: the scan generated also a lot of "false positives",
e.g., "error" reports about situations that cannot happen.
Most of those code places are marked with lint(1) comments
like NOTREACHED, but Coverity does not understand those.
Hence an explicit assertion has been added in some cases
to avoid those false positives.
If the start of the sendmail daemon fails due to a configuration
error then in some cases shared memory segments or pid
files were not removed.
If DSN support is disabled via access_db, then related ESMTP
parameters for MAIL and RCPT should be rejected. Problem
reported by Akihiro Sagawa.
Enabling zlib compression in OpenSSL 0.9.8[ab] breaks the padding
bug work-around. Hence if sendmail is linked against
either of these versions and compression is available,
the padding bug work-around is turned off. Based on
patch from Victor Duchovni of Morgan Stanley.
CONFIG: FEATURE(`dnsbl') and FEATURE(`enhdnsbl') used
blackholes.mail-abuse.org as default domain for lookups,
however, that list is no longer available. To avoid
further problems, no default value is available anymore,
but an argument must be specified.
Portability:
Fix compilation on OSF/1 for sfsasl.c. Patch from
Pieter Bowman of the University of Utah.
A malformed MIME structure with many parts can cause sendmail to
crash while trying to send a mail due to a stack overflow,
e.g., if the stack size is limited (ulimit -s). This
happens because the recursion of the function mime8to7()
was not restricted. The function is called for MIME 8 to
7 bit conversion and also to enforce MaxMimeHeaderLength.
To work around this problem, recursive calls are limited to
a depth of MAXMIMENESTING (20); message content after this
limit is treated as opaque and is not checked further.
Use a better boundary check, which doesn't depend on PATH_MAX >> NAME_MAX.
Both changes are from DragonFly and have been reported upstream.
Install only man pages, not the catpages. The installation was
inconsistent before.
Bump revision. OK from tv@.
> 8.13.6/8.13.6 2006/03/22
> SECURITY: Replace unsafe use of setjmp(3)/longjmp(3) in the server
> and client side of sendmail with timeouts in the libsm I/O
> layer and fix problems in that code. Also fix handling of
> a buffer in sm_syslog() which could have been used as an
> attack vector to exploit the unsafe handling of
> setjmp(3)/longjmp(3) in combination with signals.
> Problem detected by Mark Dowd of ISS X-Force.
> Handle theoretical integer overflows that could triggered if
> the server accepted headers larger than the maximum
> (signed) integer value. This is prevented in the default
> configuration by restricting the size of a header, and on
> most machines memory allocations would fail before reaching
> those values. Problems found by Phil Brass of ISS.
> If a server returns 421 for an RSET command when trying to start
> another transaction in a session while sending mail, do
> not trigger an internal consistency check. Problem found
> by Allan E Johannesen of Worcester Polytechnic Institute.
> If a server returns a 5xy error code (other than 501) in response
> to a STARTTLS command despite the fact that it advertised
> STARTTLS and that the code is not valid according to RFC
> 2487 treat it nevertheless as a permanent failure instead
> of a protocol error (which has been changed to a
> temporary error in 8.13.5). Problem reported by Jeff
> A. Earickson of Colby College.
> Clear SMTP state after a HELO/EHLO command. Patch from John
> Myers of Proofpoint.
> Observe MinQueueAge option when gathering entries from the queue
> for sorting etc instead of waiting until the entries are
> processed. Patch from Brian Fundakowski Feldman.
> Set up TLS session cache to properly handle clients that try to
> resume a stored TLS session.
> Properly count the number of (direct) child processes such that
> a configured value (MaxDaemonChildren) is not exceeded.
> Based on patch from Attila Bruncsak.
> LIBMILTER: Remove superfluous backslash in macro definition
> (libmilter.h). Based on patch from Mike Kupfer of
> Sun Microsystems.
> LIBMILTER: Don't try to set SO_REUSEADDR on UNIX domain sockets.
> This generates an error message from libmilter on
> Solaris, though other systems appear to just discard the
> request silently.
> LIBMILTER: Deal with sigwait(2) implementations that return
> -1 and set errno instead of returning an error code
> directly. Patch from Chris Adams of HiWAAY Informations
> Services.
> Portability:
> Fix compilation checks for closefrom(3) and statvfs(2)
> in NetBSD. Problem noted by S. Moonesamy, patch from
> Andrew Brown.
Bump to nb2
This will change the internal version of sendmail to 8.13.5.20060308
> SECURITY: Replace unsafe use of setjmp(3)/longjmp(3) in the server
> and client side of sendmail with timeouts in the libsm I/O
> layer and fix problems in that code. Also fix handling of
> a buffer in sm_syslog() which could have been used as an
> attack vector to exploit the unsafe handling of
> setjmp(3)/longjmp(3) in combination with signals.
> Problem detected by Mark Dowd of ISS X-Force.
> Handle theoretical integer overflows that could triggered if
> the server accepted headers larger than the maximum
> (signed) integer value. This is prevented in the default
> configuration by restricting the size of a header, and on
> most machines memory allocations would fail before reaching
> those values. Problems found by Phil Brass of ISS.
backslashes anymore. A single backslash is enough. Changed the
definition in all affected packages. For those that are not caught, an
additional check is placed into bsd.pkginstall.mk.
- Fix smrsh man page patch
- Tidy up MESSAGE
- Replace 8.13.1 errata with 8.13.3 errata
- Remove rename of file outside ${PREFIX} on db2 installs
> 8.13.3/8.13.3 2005/01/11
> Enhance handling of I/O errors, especially EOF, when STARTTLS
> is active.
> Make sure a connection is not reused after it has been closed
> due to a 421 error. Problem found by Allan E Johannesen
> of Worcester Polytechnic Institute.
> Avoid triggering an assertion when sendmail is interrupted while
> closing a connection. Problem found by Allan E Johannesen
> of Worcester Polytechnic Institute.
> Regression: a change in 8.13.2 caused sendmail not to try the
> next MX host (or FallbackMXhost if configured) when, at
> connection open, the current server returns a 4xy or 5xy
> SMTP reply code. Problem noted by Mark Tranchant.
>
> 8.13.2/8.13.2 2004/12/15
> Do not split the first header even if it exceeds the internal
> buffer size. Previously a part of such a header would
> end up in the body of the message. Problem noted by
> Simple Nomad of BindView.
> Do not complain about "cataddr: string too long" when checking
> headers that do not contain RFC 2822 addresses.
> Problem noted by Rich Graves of Brandeis University.
> If a server returns a 421 reply to the RSET command between
> message deliveries, do not attempt to deliver any more
> messages on that connection. This prevents bogus "Bad
> file number" recipient status. Problem noted by
> Allan E Johannesen of Worcester Polytechnic Institute.
> Allow trailing white space in EHLO command as recommended by RFC
> 2821. Problem noted by Ralph Santagato of SBC Services.
> Deal with clients which use AUTH but negotiate a smaller buffer size
> for data exchanges than the value used by sendmail, e.g.,
> Cyrus IMAP lmtp server. Based on patch by Jamie Clark.
> When passing ESMTP arguments for RCPT to a milter, do not cut
> them off at a comma. Problem noted by Krzysztof Oledzki.
> Add more logging to milter change header functions to
> complement existing logging. Based on patch from
> Gurusamy Sarathy of Active State.
> Include <lber.h> in include/sm/config.h when LDAPMAP is defined.
> Patch from Edgar Hoch of the University of Stuttgart.
> Fix DNS lookup if IPv6 is enabled when converting an IP address
> to a hostname for use with SASL. Problem noted by Ken Jones;
> patch from Hajimu UMEMOTO.
> CONFIG: For consistency enable MODIFY_MAILER_FLAGS for the prog
> mailer. Patch from John Beck of Sun Microsystems.
> LIBMILTER: It was possible that xxfi_abort() was called after
> xxfi_eom() for a message if some timeouts were triggered.
> Patch from Alexey Kravchuk.
> LIBMILTER: Slightly rearrange mutex use in listener.c to allow
> different threads to call smfi_opensocket() and smfi_main().
> Patch from Jordan Ritter of Cloudmark.
> MAIL.LOCAL: Properly terminate MBDB before exiting. Problem
> noted by Nelson Fung.
> MAIL.LOCAL: make strip-mail.local used a wrong path to access
> mail.local. Problem noted by William Park.
> VACATION: Properly terminate MBDB before exiting. Problem noted
> by Nelson Fung.
> Portability:
> Add support for DragonFly BSD.
> New Files:
> cf/ostype/dragonfly.m4
> devtools/OS/DragonFly
> include/sm/os/sm_os_dragonfly.h
> Deleted Files:
> libsm/vsscanf.c
pkgsrc changes:
- move to use options.mk framework
- solaris support tidy-up
- fix linux man page extension handling bug
- allow for a user defined smrsh directory
- update MASTER_SITES
- optional SOCKETMAP support and sample script installation
- ok'ed snj@/wiz@
Summary of some of the major changes include:
- New map "socket" to query maps via TCP/IP sockets.
- Connection rate control as well as control over the number of incoming open
connections.
- Several LDAP enhancements such as LDAP recursion and LDAP URI support.
- Message quarantining.
- AUTH EXTERNAL will only be enabled if STARTTLS was successful and the client
has been authenticated, i.e., {verify} is OK.
- Basic support for certificate revocation lists.
- New queue timeouts for DSN messages.
- Experimental support for MTAMark.
For a full list of changes see:
- http://www.sendmail.org/8.13.0.html
- http://www.sendmail.org/8.13.1.html
Changes since version 8.12.10:
Use QueueFileMode when opening qf files. This error was a
regression in 8.12.10. Problem detected and diagnosed
Lech Szychowski of the Polish Power Grid Company.
Properly count the number of queue runners in a work group and
make sure the total limit of MaxQueueChildren is not
exceeded. Based on patch from Takayuki Yoshizawa of
Techfirm, Inc.
Take care of systems that can generate time values where the
seconds can exceed the usual range of 0 to 59.
Problem noted by Randy Diffenderfer of EDS.
Avoid regeneration of identical queue identifiers by processes
whose process id is the same as that of the initial
sendmail process that was used to start the daemon.
Problem noted by Randy Diffenderfer of EDS.
When a milter invokes smfi_delrcpt() compare the supplied
recipient address also against the printable addresses
of the current list to deal with rewritten addresses.
Based on patch from Sean Hanson of The Asylum.
BadRcptThrottle now also works for addresses which return the
error mailer, e.g., virtusertable entries with the
right hand side error:. Patch from Per Hedeland.
Fix printing of 8 bit characters as octals in log messages.
Based on patch by Andrey J. Melnikoff.
Undo change of algorithm for MIME 7-bit base64 encoding to 8-bit
text that has been introduced in 8.12.3. There are some
examples where the new code fails, but the old code works.
To get the 8.12.3-8.12.10 version, compile sendmail with
-DMIME7TO8_OLD=0. If you have an example of improper
7 to 8 bit conversion please send it to us.
Return normal error code for unknown SMTP commands instead of
the one specified by check_relay or a milter for a
connection. Problem noted by Andrzej Filip.
Some ident responses contain data after the terminating CRLF which
causes sendmail to log "POSSIBLE ATTACK...newline in string".
To avoid this everything after LF is ignored.
If the operating system supports O_EXLOCK and HASFLOCK is set
then a possible race condition for creating qf files
can be avoided. Note: the race condition does not
exist within sendmail, but between sendmail and an
external application that accesses qf files.
Log the proper options name for TLS related mising files for
the CACertPath, CACertFile, and DHParameters options.
Do not split an envelope if it will be discarded, otherwise df
files could be left behind. Problem found by Wolfgang
Breyha.
The use of the environment variables HOME and HOSTALIASES has been
deprecated and will be removed in version 8.13. This only
effects configuration which preserve those variable via the
'E' command in the cf file as sendmail clears out its entire
environment.
Portability:
Add support for Darwin 7.0/Mac OS X 10.3 (a.k.a. Panther).
Solaris 10 has unsetenv(), patch from Craig Mohrman of
Sun Microsystems.
LIBMILTER: Add extra checks in case a broken MTA sends bogus data
to libmilter. Based on code review by Rob Grzywinski.
SMRSH: Properly assemble commands that contain '&&' or '||'.
Problem noted by Eric Lee of Talking Heads.
New Files:
devtools/OS/Darwin.7.0
that do make it into the binary package. Under the default configuration
on NetBSD these files are erroneous. This fix should resolve PR 20852
Here are the details:
1) /etc/mail/statistics
This file is created like so:
statistics:
${CP} /dev/null statistics
This file is not needed because sendmail is configured to use:
O StatusFile=/var/log/sendmail.st
To avoid creating this file, I added to devtools/OS/NetBSD:
define(`confNO_STATISTICS_INSTALL', `')
2) /etc/mail/submit.cf
This file is not needed because we install it as:
${PREFIX}/share/sendmail/cf/submit.cf
To avoid installing /etc/mail/submit.cf, I added to devtools/OS/NetBSD:
define(`confINST_DEP', `')
If confINST_DEP is undefined, then it will default to:
`${DESTDIR}/etc/mail/submit.cf ${DESTDIR}${MSPQ}'
3) /var/db/pkg/sendmail-8.12.8nb1/+INSTALL
This is now created by pkg_add with the binary package.
It appears the problem is resolved.
4) /var/spool/clientmqueue
This directory is not needed because sendmail is configured to use:
O QueueDirectory=/var/spool/mqueue
To avoid installing this directory, I added to devtools/OS/NetBSD:
define(`confINST_DEP', `')
8.12.10/8.12.10 2003/09/24
SECURITY: Fix a buffer overflow in address parsing. Problem
detected by Michal Zalewski, patch from Todd C. Miller
of Courtesan Consulting.
Fix a potential buffer overflow in ruleset parsing. This problem
is not exploitable in the default sendmail configuration;
only if non-standard rulesets recipient (2), final (4), or
mailer-specific envelope recipients rulesets are used then
a problem may occur. Problem noted by Timo Sirainen.
Accept 0 (and 0/0) as valid input for set MaxMimeHeaderLength.
Problem noted by Thomas Schulz.
Add several checks to avoid (theoretical) buffer over/underflows.
Properly count message size when performing 7->8 or 8->7 bit MIME
conversions. Problem noted by Werner Wiethege.
Properly compute message priority based on size of entire message,
not just header. Problem noted by Axel Holscher.
Reset SevenBitInput to its configured value between SMTP
transactions for broken clients which do not properly
announce 8 bit data. Problem noted by Stefan Roehrich.
Set {addr_type} during queue runs when processing recipients.
Based on patch from Arne Jansen.
Better error handling in case of (very unlikely) queue-id conflicts.
Perform better error recovery for address parsing, e.g., when
encountering a comment that is too long. Problem noted by
Tanel Kokk, Union Bank of Estonia.
Add ':' to the allowed character list for bogus HELO/EHLO
checking. It is used for IPv6 domain literals. Patch from
Iwaizako Takahiro of FreeBit Co., Ltd.
Reset SASL connection context after a failed authentication attempt.
Based on patch from Rob Siemborski of CMU.
Check Berkeley DB compile time version against run time version
to make sure they match.
Do not attempt AAAA (IPv6) DNS lookups if IPv6 is not enabled
in the kernel.
When a milter adds recipients and one of them causes an error,
do not ignore the other recipients. Problem noted by
Bart Duchesne.
CONFIG: Use specified SMTP error code in mailertable entries which
lack a DSN, i.e., "error:### Text". Problem noted by
Craig Hunt.
CONFIG: Call Local_trust_auth with the correct argument. Patch
from Jerome Borsboom.
CONTRIB: Better handling of temporary filenames for doublebounce.pl
and expn.pl to avoid file overwrites, etc. Patches from
Richard A. Nelson of Debian and Paul Szabo.
MAIL.LOCAL: Fix obscure race condition that could lead to an
improper mailbox truncation if close() fails after the
mailbox is fsync()'ed and a new message is delivered
after the close() and before the truncate().
MAIL.LOCAL: If mail delivery fails, do not leave behind a
stale lockfile (which is ignored after the lock timeout).
Patch from Oleg Bulyzhin of Cronyx Plus LLC.
Portability:
Port for AIX 5.2. Thanks to Steve Hubert of University
of Washington for providing access to a computer
with AIX 5.2.
setreuid(2) works on OpenBSD 3.3. Patch from
Todd C. Miller of Courtesan Consulting.
Allow for custom definition of SMRSH_CMDDIR and SMRSH_PATH
on all operating systems. Patch from Robert Harker
of Harker Systems.
Use strerror(3) on Linux. If this causes a problem on
your Linux distribution, compile with
-DHASSTRERROR=0 and tell sendmail.org about it.
Added Files:
devtools/OS/AIX.5.2
update provided by Adrian Portelli in PR pkg/22836.
Also SASL 2 support added and PLIST tuning.
8.12.8/8.12.8 2003/02/11
SECURITY: Fix a remote buffer overflow in header parsing by
dropping sender and recipient header comments if the
comments are too long. Problem noted by Mark Dowd
of ISS X-Force.
Fix a potential non-exploitable buffer overflow in parsing the
.cf queue settings and potential buffer underflow in
parsing ident responses. Problem noted by Yichen Xie of
Stanford University Compilation Group.
Fix ETRN #queuegroup command: actually start a queue run for
the selected queue group. Problem noted by Jos Vos.
If MaxMimeHeaderLength is set and a malformed MIME header is fixed,
log the fixup as "Fixed MIME header" instead of "Truncated
MIME header". Problem noted by Ian J Hart.
CONFIG: Fix regression bug in proto.m4 that caused a bogus
error message: "FEATURE() should be before MAILER()".
MAIL.LOCAL: Be more explicit in some error cases, i.e., whether
a mailbox has more than one link or whether it is not
a regular file. Patch from John Beck of Sun Microsystems.
8.12.7/8.12.7 2002/12/29
Properly clean up macros to avoid persistence of session data
across various connections. This could cause session
oriented restrictions, e.g., STARTTLS requirements,
to erroneously allow a connection. Problem noted
by Tim Maletic of Priority Health.
Do not lookup MX records when sorting the MSP queue. The MSP
only needs to relay all mail to the MTA. Problem found
by Gary Mills of the University of Manitoba.
Do not restrict the length of connection information to 100
characters in some logging statements. Problem noted by
Erik Parker.
When converting an enhanced status code to an exit status, use
EX_CONFIG if the first digit is not 2, 4, or 5 or if *.1.5
is used.
Reset macro $x when receiving another MAIL command. Problem
noted by Vlado Potisk of Wigro s.r.o.
Don't bother setting the permissions on the build area statistics
file, the proper permissions will be put on the file at
install time. This fixes installation over NFS for some
users. Problem noted by Martin J. Dellwo of 3-Dimensional
Pharmaceuticals, Inc.
Fix problem of decoding SASLv2 encrypted data. Problem noted by
Alex Deiter of Mobile TeleSystems, Komi Republic.
Log milter socket open errors at MilterLogLevel 1 or higher instead
of 11 or higher.
Print early system errors to the console instead of silently
exiting. Problem noted by James Jong of IBM.
Do not process a queue group if Runners is set to 0, regardless
of whether F=f or sendmail is run in verbose mode (-v).
The use of -qGname will still force queue group "name"
to be run even if Runners=0.
Change the level for logging the fact that a daemon is refusing
connections due to high load from LOG_INFO to LOG_NOTICE.
Patch from John Beck of Sun Microsystems.
Use location information for submit.cf from NetInfo
(/locations/sendmail/submit.cf) if available.
Re-enable ForkEachJob which was lost in 8.12.0. Problem noted by
Neil Rickert of Northern Illinois University.
Make behavior of /canon in debug mode consistent with usage in
rulesets. Patch from Shigeno Kazutaka of IIJ.
Fix a potential memory leak in envelope splitting. Problem noted
by John Majikes of IBM.
Do not try to share an mailbox database LDAP connection across
different processes. Problem noted by Randy Kunkee.
Fix logging for undelivered recipients when the SMTP connection
times out during message collection. Problem noted by Neil
Rickert of Northern Illinois University.
Avoid problems with QueueSortOrder=random due to problems with
qsort() on Solaris (and maybe some other operating systems).
Problem noted by Stephan Schulz of Gruner+Jahr..
If -f "" is specified, set the sender address to "<>". Problem
noted by Matthias Andree.
Fix formatting problem of footnotes for plain text output on some
versions of tmac. Patch from Per Hedeland.
Portability:
Berkeley DB 4.1 support (requires at least 4.1.25).
Some getopt(3) implementations in GNU/Linux are broken
and pass a NULL pointer to an option which requires
an argument, hence the builtin version of
sendmail is used instead. This can be overridden
by using -DSM_CONF_GETOPT=0. Problem noted by
Vlado Potisk of Wigro s.r.o.
Support for nph-1.2.0 from Mark D. Roth of the University
of Illinois at Urbana-Champaign.
Support for FreeBSD 5.0's MAC labeling from Robert Watson
of the TrustedBSD Project.
Support for reading the number of processors on an IRIX
system from Michel Bourget of SGI.
Support for UnixWare 7.1 based on input from Larry Rosenman.
Interix support from Nedelcho Stanev of Atlantic Sky
Corporation.
Update Mac OS X/Darwin portability from Wilfredo Sanchez.
CONFIG: Enforce tls_client restrictions even if delay_checks
is used. Problem noted by Malte Starostik.
CONFIG: Deal with an empty hostname created via bogus
DNS entries to get around access restrictions.
Problem noted by Kai Schlichting.
CONFIG: Use FEATURE(`msp', `[127.0.0.1]') in submit.mc by default
to avoid problems with hostname resolution for localhost
which on many systems does not resolve to 127.0.0.1 (or
::1 for IPv6). If you do not use IPv4 but only IPv6 then
you need to change submit.mc accordingly, see the comment
in the file itself.
CONFIG: Set confDONT_INIT_GROUPS to True in submit.mc to avoid
error messages from initgroups(3) on AIX 4.3 when sending
mail to non-existing users. Problem noted by Mark Roth of
the University of Illinois at Urbana-Champaign.
CONFIG: Allow local_procmail to override local_lmtp settings.
CONFIG: Always allow connections from 127.0.0.1 or IPv6:::1 to
relay.
CONTRIB: cidrexpand: Deal with the prefix tags that may be included
in access_db.
CONTRIB: New version of doublebounce.pl contributed by Leo Bicknell.
LIBMILTER: On Solaris libmilter may get into an endless loop if
an error in the communication from/to the MTA occurs.
Patch from Gurusamy Sarathy of Active State.
LIBMILTER: Ignore EINTR from sigwait(3) which may happen on Tru64.
Patch from from Jose Marcio Martins da Cruz of Ecole
Nationale Superieure des Mines de Paris.
MAIL.LOCAL: Fix a truncation race condition if the close() on
the mailbox fails. Problem noted by Tomoko Fukuzawa of
Sun Microsystems.
MAIL.LOCAL: Fix a potential file descriptor leak if mkstemp(3)
fails. Patch from John Beck of Sun Microsystems.
SMRSH: SECURITY: Only allow regular files or symbolic links to be
used for a command. Problem noted by David Endler of
iDEFENSE, Inc.
New Files:
devtools/OS/Interix
include/sm/bdb.h
have it be automatically included by bsd.pkg.mk if USE_PKGINSTALL is set
to "YES". This enforces the requirement that bsd.pkg.install.mk be
included at the end of a package Makefile. Idea suggested by Julio M.
Merino Vidal <jmmv at menta.net>.
Large number of bug fixes and feature enhancements, especially Milter
(Mail Filter) support and by default installation of sendmail does not use
set-user-ID root anymore.
