[Mimedefang] relaying mail

[Lucas Albers]

sendmail settings.
set dns entry so relay has lower mx mail record then internal machine.

then set machine to relay based on mx.
FEATURE(relay_based_on_MX)dnl

then set mailertable settings.
FEATURE(`mailertable')dnl
/etc/mail/mailertable:
#domain to accept mail for and mailserver
#don't consult dns to determine how to relay
coe.montana.edu                 esmtp:[power.coe.montana.edu]

then set bounce
define(`confDOUBLE_BOUNCE_ADDRESS', `root')

then set to keep addresses that are in + format.
dnl keeps the + and does not expand alias
FEATURE(`preserve_local_plus_detail')dnl

My other advice is this.
If it is the only incoming mail relay, I would verify thus.
Have a slower secondary mx backup mail server.

Make sure management/users are notified of what attachmeents you will
block and subject/content mungting you will do based on spamassassin.

In my relay configuration I don't modify ANY subjects or content, I just add
x-headers and let clients handle. Becasuse we also have internal spam
programs that would not work correctly if the content was changed.

-- 
Luke Computer Science System Administrator
Security Administrator,College of Engineering
Montana State University-Bozeman,Montana