Disable Spam for a domains that use external spam filtering service

[Eric]

I have AV/AS enabled on Zimbra.
I have several domains that use an external spam filtering service. These domain owners do not wish to have their mail filtered twice, since they need to enter 2 separate web interfaces to manage the spam. They use pop3 and do not use the Zimbra web interface, so checking the Junk is an additional unwanted task.
Is there a way to configure Zimbra to have all mail delivered to such domains without filtering?
Thanks, Eric

[rsharpe]

I don't think AV/AS is available on a per domain basis, and neither are the kill/tag points. If you have the resources create another MTA direct certain domains to that MTA and disable the AV/AS and the forward the mail to the mailstore.

[Eric]

Thanks. I am aware that AV/AS are site wide settings, however I was wondering if there is a rule (similar to whitelisting/blacklisting) that can be applied, so a domain will be ignored by the AV/AS engines.