This shows only what's new in 8.9.1, for older versions see the 8.9.0 RELEASE NOTES.
8.9.1/8.9.1 98/07/02 If both an OS specific site configuration file and a generic site.config.m4 file existed, only the latter was used instead of both. Problem noted by Geir Johannessen of the Norwegian University of Science and Technology. Fix segmentation fault while converting 8 bit to 7 bit MIME multipart messages by trying to write to an unopened file descriptor. Fix from Kari Hurtta of the Finnish Meteorological Institute. Do not assume Message: and Text: headers indicate the end of the header area when parsing MIME headers. Problem noted by Kari Hurtta of the Finnish Meteorological Institute. Setting the confMAN#SRC Build variable would only effect the installation commands. The man pages would still be built with .0 extensions. Problem noted by Bryan Costales of InfoBeat, Inc. Installation of manual pages didn't honor the DESTDIR environment variable. Problem noted by Bryan Costales of InfoBeat, Inc. If the check_relay ruleset resolved to the discard mailer, messages were still delivered. Problem noted by Mirek Luc of NASK. Mail delivery to files would fail with an Operating System Error if sendmail was not running as root, i.e. RunAsUser was set. Problem noted by Leonard N. Zubkoff of Dandelion Digital. Prevent MinQueueAge from interfering from queued items created in the future, i.e. if the system clock was set ahead and then back. Problem noted by Michael Miller of the University of Natal, Pietermaritzburg. Do not advertise ETRN support in ESTMP EHLO reply if noetrn is set in the PrivacyFlags option. Fix from Ted Rule of Flextech TV. Log invalid persistent host status file lines instead of bouncing the message. Problem noted by David Lindes of DaveLtd Enterprises. Move creation of empty sendmail.st file from installation to compilation. Installation may be done from a read-only mount. Fix from Bryan Costales of InfoBeat, Inc. and Ric Anderson of the Oasis Research Center, Inc. Enforce the maximum number of User Database entries limit. Problem noted by Gary Buchanan of Credence Systems Inc. Allow dead.letter files in root's home directory. Problem noted by Anna Ullman of Sun Microsystems. Program deliveries in forward files could be marked unsafe if any directory listed in the ForwardPath option did not exist. Problem noted by Jorg Bielak of Coastal Web Online. Do not trust the length of the address structure returned by gethostbyname(). Problem noted by Chris Evans of Oxford University. If the SIZE= MAIL From: ESMTP parameter is too large, use the 5.3.4 DSN status code instead of 5.2.2. Similarly, for non-local deliveries, if the message is larger than the mailer maximum message size, use 5.3.4 instead of 5.2.3. Suggested by Antony Bowesman of Fujitsu/TeaWARE Mail/MIME System. Portability: Fix the check for an IP address reverse lookup for use in $&{client_name} on 64 bit platforms. From Gilles Gallot of Institut for Development and Resources in Intensive Scientific computing. BSD-OS uses .0 for man page extensions. From Jeff Polk of BSDI. DomainOS detection for Build. Also, version 10.4 and later ship a unistd.h. Fixes from Takanobu Ishimura of PICT Inc. NeXT 4.x uses /usr/lib/man/cat for its man pages. From J. P. McCann of E I A. SCO 4.X and 5.X include NDBM support. From Vlado Potisk of TEMPEST, Ltd. CONFIG: Do not pass spoofed PTR results through resolver for qualification. Problem noted by Michiel Boland of Digital Valley Internet Professionals; fix from Kari Hurtta of the Finnish Meteorological Institute. CONFIG: Do not try to resolve non-DNS hostnames such as UUCP, BITNET, and DECNET addresses for resolvable senders. Problem noted by Alexander Litvin of Lucky Net Ltd. CONFIG: Work around Sun's broken configuration which sends bounce messages as coming from @@hostname instead of <>. LMTP would not accept @@hostname. OP.ME: Corrections to complex sendmail startup script from Rick Troxel of the National Institutes of Health. RMAIL: Do not install rmail by default, require 'make force-install' as this rmail isn't the same as others. Suggested by Kari Hurtta of the Finnish Meteorological Institute.