block msgs based on filename without using antivirus?

[Furnish, Trever G]

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I have the terrible feeling that a way of doing this ought to be jumping into my mind, but I'm not getting it.

I have a system configured which barely meets our load under the current sober onslaught and is not currently configured with any virus scanning, just spam filtering.  As such I hesitate to add any virus scanning as it might increase the server load too much.

We're blocking the sober attachment filenames using filename.rules.conf, and I switched those rules from "deny" to "deny+delete" (not sure what that option is supposed to do - couldn't find documentation on it), but that doesn't stop the rest of the message from being delivered.

Using spamassassin to mark the sober messages as 'high scoring spam' isn't really an option, because we still deliver 'high scoring spam' for other business reasons.

Is there any way to delete the sober messages based on attachment filename, without running antivirus checks?  I suppose I could look at the code that interfaces to the "real" antivirus engines and hack up an engine to just reject those messages - I'm hoping there's an easier way.

Thanks,
Trever

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