Hi - is anyone aware of a greylisting plugin for qmail that works in the exact same way as spamd does on openbsd in that:
Initially we want to care about relay_ip, mail_from & rcpt_to. But once a mail has been re-sent that matches all three of those - ie. the exact same mail is sent 5+ mins later, we then want to accept all mail from that sender IP address for the next 36 days, regardless of either the mail_from or rcpt_to data.
I've been using the greylisting plugin from http://manuel.mausz.at/coding/qmail-spp/greylisting/ and a customised one from the author that uses just relay_ip on another platform and they've been excellent for detering unwanted mail.
This platform is a load balanced cluster of mail servers handling around 1 million emails a day so its vital that all the servers can share the same greylisting data - a mysql backend server is used in my other setups.
Thanks - Julian.
Julian Grunnell
3rd Line Technical Support
Pipex Communications
Tel: 01296 300227
Mob: 07803 649593
Web: http://www.pipex.com/
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