[Tfug] Suggestions for an email gateway

[Mike Morrell]

  Thanks Sam.  It may be overkill for my pitiful little network but it
should be fun putting it all together.


Mike

> Well, I'll admit I am a little bit biased, considering I teach this in my
> class, heh-heh-heh ;-)
>
> But I like Postfix+Amavisd-new+SpamAssassin+DCC+Sophos+Sophie. I've found
> that it is /very/ efficient for systems with high mail throughput (but I'd
> still probably put it on a dedicated box) and, if you're willing to tweak
> the SpamAssassin rules a bit, you'll get something that filters spam
> /really/ well.
>
> I actually have an online walkthrough for setting it up which I teach in
> my class. You can get it here:
>  http://www.geekcomix.com/cgi-bin/classnotes/wiki.pl?Setting_Up_An_Anti-SPAM_Gateway
>
> My walkthrough was based in part on this one:
>  http://lawmonkey.org/anti-spam.html
>
> One bit of advice: Chrooting everything does make things more secure, but
> outside of an educational environment (or a highly paranoid one) I don't
> see the need. If you get rid of the custom Chrooting of Amavisd-new, you
> shave off a couple of hours of work, and still have something that is very
> secure (obviously, still run Postfix chroot).
>
> You can use other MTAs with this same setup if you desire (you're using
> Amavisd-new as the interface to everything else), but I personally like
> the efficiency of Postfix.
>
> Oh, I have about two years worth of data on this type of setup (basically,
> filtered, false-positives and negatives from tux4kids.net as well as
> geekcomix.com). One of these days I'm going to tabulate it and do some
> data analysis on it so I can give some concrete evidence that this setup
> actually works ;-)
>
> * On 03-11-23, Mike Morrell wrote:
>
>>   I want to setup an email gateway to handle SPAM and AV scanning on my
>> firewall.  Whats the best MTA to handle such a simple role?  It does not
>> need to do anything more then relay and maybe queue emails if my email
>> server is down.  I was going to use Courier but that seems like
>> overkill.
>>
>>
>> Mike
>>
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>
> --
> Sam Hart
> University/Work addr. <hart at physics.arizona.edu>
> Personal addr. <criswell at geekcomix.com>
> Alternative <criswell at tux4kids.net>
> end
>
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