[Mimedefang] Validate users before scanning?

[Tina Marie]

Thanks to an auto-updating clamAV and mimeDefang, I didn't even
notice the new Sober.P worm until I noticed my load up a bit
(from all the scanning).

It looks to me like most of the ones I'm getting are addressed
to addresses that sendmail is going to reject in the virtuser
table.  It seems like a waste to scan these if I was going to
reject them as NoSuchUser anyway.

I googled, but I didn't see anything applicable, but that was 
probably my lack of a sufficiently good search string.  I
found lots of ways to do it with LDAP, but I just have one 
machine, and that seems like overkill.

Is there a way to check, from MimeDefang, that, yes, this
address is deliverable, before I try to scan it?

Thanks!

Tina Marie
-- 
http://www.tripacerdriver.com               "...One of the main causes 
of the fall of the Roman Empire was that, lacking zero, they had no way
to indicate successful termination of their C programs." (Robert Firth)