I have more or less the same setup as described (RBL->GreyL->SA/AV) using pythonfilter, it all works perfectly out of the box and I only tweaked which modules I wished to use. I had about 1000+ spams per day and now it's only something like 5 a week.

To be complete though, I must add that there are two drawbacks to greylisting :

* not immediate delivery for first mail is annoying when you register on a website and have to wait... some minutes before being able to use the account. I use dummy gmail address for the purpose but then I have to switch to my real address on the site and... you see, it's eating up useful time to do something rather "stupid".

* greylisting works with triplets : IP of sending mail server, sender's email and recipient's email. When dealing with smtp farms, the same message may come out from any of the server and thus be greylisted several times until it is finally submitted with one of the greylisted IP. Either you live with it (I tell those who complain that their mail provider has a broken setup, not sure if I'm right there :-)) or you whitelist those domains (hotmail is one of them).

Regards,

JC

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