3rd party spam filter and virtual users

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3rd party spam filter and virtual users
\ Lars Johansen (15 May 2007)
. \ Noel Jones (15 May 2007)
. \ John Evans (15 May 2007)
. . \ Victor Duchovni (15 May 2007)

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6 msg	sasl problem

Subject:	3rd party spam filter and virtual users
Group:	Postfix-users
From:	Lars Johansen
Date:	15 May 2007

Hi we have a setup with postfixadmin and virtual users.. everything
works great, but we have one issue.

We want to use a 3rd party spam service provider.. but we dont want to
set our MX records to them..

The thing we want is to be able to filter all mail that does not come
from this 3rd party.. and redirect it to them..

afaik procmail doenst work with virtual users?

do you have any hints on how this could be done ?

Greetings,

Lars Johansen