> Yep, already running greylisting. (I did say I was running spamd.)
> 
> Thanks,

Are you using the valid rcpt to check in greyscanner, when tied with
disposable addresses, it is very effective atleast with informed users.
I have a perl script or two that reads my smtpd configuration files and
works out valid recipients from that but I started with a simple list
of perl regex.

Also it is easy to knock up a script using spamdb and dig to check
dnsbls like barracudas, couple it with unbound as a caching resolver.

Let me know if you need help with that?

-- 

KISSIS - Keep It Simple So It's Securable

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