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osmtpd is an smtp server which means it listens for smtp connections recives mails, saves them to disk and askes a 'mail-server' like sendmail, qmail, exim or postfix to further process it.
osmtpd is based on obtuse smtpd 2.0, a
security minded smtp server with had strong anti-spam
features for its time. Obtuse smtpd hasn't been developed
further since 1997.
dorkslayers.com
produced a patch to add RBL support to smtpd. The OpenBSD Team later
included smtpd in their source repository and added various
enhancements. I also did similar enhancements but when I
found the ones by the OpenBSD team I concluded theirs where
much better tested and created a patch
relative to smtpd 2.0 containing the OpenBSD enhancements
and some of my stuff. There is also a patch
available bringing smtpd 2.0 to OpenBSD 3.0 level.
Meanwhile Liam Widdowson created Obtuse SMTPD
Spammer Deterrent which has up-to-date anti-spam features.
osmtpd is here to merge and document all this enhancements in a consistent way and to add new features. Especiall SMTP AUTH and STARTTLS support is badly needed.
Hacked by Doobee R Tzeck, drt@un.bewaff.net
Last modified: Thu May 23 21:04:16 CEST 2002