Nate Sanders wrote:

> Mailing lists are going to really make this difficult :-]

Yeah, they make just about any spam solution difficult.
We use a global forged mail filter on our server. Any
incoming mail to our server from a remote host that is
not on a whitelist and claims to be from an internal
domain gets rejected with a 554 SMTP code.

This solution has completely eliminated the confusion
our users experienced when spammers would forge mail
from local businesses. (Dear WingNET, such-and-such
local business sent me spam, what's up with that?)
But the drawback to this solution is that we have to
whitelist each user's mailing list server and
companies like ebay, etc...

(BTW, this forged email blocking software is based on
TMDA code, and thus is available under GPL if anyone
wants a copy. It's designed to run under qmail-qfilter
and thus requires Qmail. Let me know if you want a
copy.)

Personally, I really like Kyle's solution to filter
mailing list traffic BEFORE it hits TMDA. Does anyone
know if there is a really good web interface available
to automate the creation of server-side filtering rules?
I might even be willing to pay for it if it's good
enough.

I've been looking for something to do server-side
filtering from a web interface anyway (currently
using maildrop on a per user basis with hand written
rules for internal WingNET staff only, and would
like to offer it as part of standard email), but
it looks like such an interface could make Kyle's
solution managable on a server-wide level.


-- 
Jesse Guardiani, Systems Administrator
WingNET Internet Services,
P.O. Box 2605 // Cleveland, TN 37320-2605
423-559-LINK (v)  423-559-5145 (f)
http://www.wingnet.net


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