courier-0.53.1 as mail/courier-mta.
The Courier mail transfer agent (MTA) is a modular multiprotocol mail
server that's designed to strike a balance between reasonable performance,
flexibility and features.
This package differs from traditional courier-mta packages in that
the webmail, imap/pop3, and maildrop components are not included
because they are supplied by the mail/sqwebmail, mail/courier-imap,
and mail/maildrop packages, respectively. When Courier-MTA is installed
together with Courier-IMAP and SqWebMail, they form an integrated
mail/groupware server suite that provides ESMTP, IMAP, POP3, webmail,
and mailing list services within a single, consistent, framework. A
web-based administration and configuration tool is included for
comprehensive configuration of the entire Courier software suite.
Many thanks to Yarema <yds@CoolRat.org> whose Courier port for FreeBSD
was an invaluable reference.