From: Alex Woick (alexwombaz.de)
Date: Thu Feb 28 2008 - 07:15:38 CST

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I am using an smtp-based after-queue content filter that is activated
via the content_filter = ... keyword in main.cf.

Now, I want to skip filtering for certain recipients, but only if they
are the sole recipient. If the recipient doesn't match a predefined list
or there are multiple recipients for the same message, the filter should
still be called.

After reviewing the mailing list and the documentation, I see the only
solution is using a policy server that looks into the recipient_count
value in the END-OF-MESSAGE stage. It should send a "action=DUNNO" only
if the recipient=... matches and recipient_count==1. And "action=FILTER
myfilter:" otherwise. Am I right?

Are there policy servers around that I can use for this purpose? Or
perl-based ones that I can hack with minimal effort?

Tschau
Alex

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