Where should I start looking to make sure that any emails sent FROM my mail server are not marked as spam? (All users must use SMTP AUTH, so I'm not worried about relaying)
I only started using Postfix (2.0.12) recently after many years of Exim. I've configured it such, that it uses amavisd-new for SA-based filtering.
Incoming mail comes in on port 25 and is passed to Amavis on port 10024 with ESMTP. When Amavis has scanned it and done its stuff, it hands it back to Postfix on port 10025.
Outgoing mail goes directly to Postfix on port 10025, which has no provision for scanning. I don't enforce this with my current setting, but could do easily, by blocking port 25 for outgoing stuff.
Note that running 2 instances of Postfix doesn't involve the same overhead that running 2 instances of Exim or Sendmail would do - only the smtpd daemon (one of many small, lightweight daemons) is involved and is called by an inetd-like daemon (master), only when needed.
All clients for outgoing mail are forced to STARTTLS and then SMTP AUTH using CRAM or DIGEST-MD5 (both are available.).
Tony
-- Tony Earnshaw
Humor him and he'll go away
http://j-walk.com/blog/docs/conference.htm http://www.billy.demon.nl Mail: [EMAIL PROTECTED]
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