Anti spam solutions

[Ralph Doncaster]

Another RBL I've found useful is the easynet.nl RBL.  We use a few RBLs, a
few postfix anti-spam features (like fqdn in the HELO), plus postfix body
checks to block things like SWAN.

I don't like spamassassin since it's a resource hog (I'm talking about
running on a mail server with thousands of accounts).

I've looked for a free honeypot/rbl package but haven't found one.  I
figure something like that plus a dynamic soft bounce (4xx retry) for new
smtp servers would get our spam rejection rate up from ~80% to >95% while
still maintaining near 0 false positives.

Ralph Doncaster, IStop.com president
6042147 Canada Inc.
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