11/11 I'm trying to configure a sendmail server to allow legit Berkeley
students to use it as an smtp server but not allow spam. Is there
a way to do this? It seems like uclink4 allows external ISPs to
utilize it as an outgoing mail server while filtering out spam
somehow.
\_ Isn't there a way to look at the return address and make sure
that it's coming from Berkeley?
\_ set the rberkeley ip address ranges into your relayok file.
\add something like FEATURE(access_db, dbm -o /etc/mail/access)dnl
and then add 128.32 RELAY or something like that or more risky but
more flexible building with: FEATURE(relay_local_from)dnl
will will mail as long as a local domain smtp sender is specifed
or "faked". this doesnt impact spam filtering but might allow relaying.
really you are more likely to get blacklisted for this than used as a
relay. --psb
\_ You're much better off using SMTP Authentication, or for the brave,
Sendmail/TLS then IP range based relaying. There are quite a few
hacks involving watching pop/imap logs and editing the realyok file
but they are pretty damn kludgy. And I don't know if I would use
uclink4 as a good example of how things should be run. |