[69100] in North American Network Operators' Group
Re: Throttling mail
daemon@ATHENA.MIT.EDU (Scott Call)
Thu Mar 25 13:42:22 2004
Date: Thu, 25 Mar 2004 10:41:45 -0800 (PST)
From: Scott Call <scall@devolution.com>
To: <nanog@merit.edu>
In-Reply-To: <Pine.LNX.4.44.0403250928020.27911-100000@adibox.knet.ca>
Errors-To: owner-nanog-outgoing@merit.edu
On Thu, 25 Mar 2004, Adi Linden wrote:
>
> Does anyone have any resources on building a mail relay that would limit
> the amount of email a single user or ip address can relay over a given
> time period?
>
> I have a spam/virus problem that is getting out of hand.
>
Depending on your MTA poison of choice there's lots out there. Personally
I use exim in most of my deployments, and it has a very nice progressive
rate limiting feature (ie accept two MAIL commands with no delay, at 0.5
seconds for the third, scaling at a rate a 1.05 times per message until 5
minute delay per message is reached) that is fully configurable.
(http://www.exim.org/exim-html-4.30/doc/html/spec_14.html#IX1351)
Exim, as well as almost every other MTA out there has support for inline
virus scanning, which may help with your problem as well.
-Scott
> Adi
>
>
>
>
> !DSPAM:4062fb3090826102911420!
>
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--
Scott Call Router Geek, ATGi, home of $6.95 Prime Rib
I make the world a better place, I boycott Wal-Mart
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