With Amavisd-new, Postfix and SpamAssassin on Debian, using a BEFORE-QUEUE
setup (i.e. dual SMTPD) I would like to achieve the following:
1. If (spam score <= tag2_level)
Then Deliver mail to the 2nd SMTPD (localhost:10025) immediately
2. If (tag2_level <= spam score <= kill_level)
Then Deliver mail to another SMPTD (e.g. localhost:10026), this SMTPD
would use greylisting.
Returning a 4xx (temp failure) on these mails for a while should filter
out spam. Everything that is unlikely to be spam would have been delivered
without any dealy via the non-greylisting SMTPD in 1.
3. Quarantine all mails above the kill level and send back a 5xx
(permanent failure)
I have 1 and 3 implemented and things work fine.
Setting a SMPTD to use greylisting as a Postfix policy_server is no problem.
But how do I get Amavis to send to this greylisting SMPTD, based on the
spam score ?
Using Greylisting on the grey area of spam scores appears very promising
to me. The number of FPs should be low and the user would not have to deal
with any quarantine release tools.
Is there a way to achieve this via the existing configuration options in
Amavid-new ?
Thanks for any hints
Jochen
PS: Forgive if this has been already been asked and solved, I couldn't
find any solution for this in any documentation, FAQ or mailing list
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