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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