We are using a redhat based system (based on v7.0) and sendmail/procmail for e-mail.
I was wondering if there are any nice anti-spam packages out there rather that the usual blacklist-type packages.
What I want is a server that will verify HELO/EHELO and MAIL From: headers with DNS lookups. You know the score: received-from a relaying mail server, where that server happily accepts connections from ppp clients posing as non-existent domains.
Anybody come across anything like that?
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