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Fwd: Re: exim - spamassassin? - msexchange

Forgot about the list :(

----- Forwarded message from Joost De Cock <joost.decock@astrid.be> -----
    Date: Wed, 24 Mar 2004 21:20:30 +0100
    From: Joost De Cock <joost.decock@astrid.be>
Reply-To: Joost De Cock <joost.decock@astrid.be>
 Subject: Re: exim - spamassassin? - msexchange
      To: Michael Kahle <michael.kahle@scc-wi.com>

Quoting Michael Kahle <michael.kahle@scc-wi.com>:

> I would like to setup a intermediary mail server that will filter email
> coming in for spam and then reroute the "good" mail to my msexchange server.
> Any suggestions on what I should use to do this?

I have setup an anti-spam relay server as you describe. I use postfix, with
amavisd-new and spamassassin.
A cool thing I have setup is per-user configuration. Our users can login an a
web interface (authentication via LDAP on Active Directory) and set the levels
for tagging spam and manage their blacklist and whitelist.
The web interface is a quick hack I did myself (it's PHP) but if you're
interested, I'll sent you the code.
A plus of amavisd-new is that you can just as easy make it filter your mail to
the anti-virus software of your choice (I use clamav). Another anti-virus layer
never hurts :)

> I am currently thinking that I need to use exim as my mta and spamassassin
> as my filtering program.  Does this sound like a good approach?
The per-user config needs amavisd-new. As MTA, choose whatever you like best.

> What
> problems should I expect up front so that I can perhaps account for these
> before I change over?  Is there a system that would allow users to send an
> email to say nospam@mydomain.com and it could automatically process this
> mail as spam and prevent future delivery?
You mean a spamtrap? That can be done, but I haven't tried it.
> Thanks for your time and opinions.
> Michael

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