-ray wrote:
Check out milter-greylist, (this can be done in mimedefang, but it's a much more lightweight as a milter). Or any other greylist solution, for that matter.I read an article in SysAdmin that talked about setting up a spamtrap on a secondary or tertiary MX box. The box would look like a good MTA, answers helo and 'mail from', but on 'rcpt to' always returns "451 Try again later". The idea being spammers prefer secondary MX's, but will never try again. A legit host that happens to connect will of course try again later (hopefully to primary MX). The author claims this reduced spam intake by 10%.
Anyone done anything similar? Any thoughts? Seems like a simple way to catch a lot of spam...
It's working quite well. I think there are still some issues that you hit if you're greylisting millions of entries, but for mid-small servers, it's quite nice.
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Graham Dunn, IT Manager Inscriber Technology Corporation 26 Peppler St, Waterloo, ON, CA N2J3C4 519 570 9111 x243
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