[Mimedefang] tmpfs queue directories

[Justin]

I of course thought of another point to ask about after I sent my first
message. :)  Is it considered acceptable to only perform AV checks on
messages smaller than a certain threshold?  We only scan for spam on 
messages smaller than 100KB.  What are the odds of an email virus being 
found in a 15MB attachment?  I know that a 15MB Word document could very 
well have a macro virus.  I'm wondering if it would still be worthwhile to 
only scan attachments under, say, 500KB for viruses.  Would that be a good 
idea?  That would certainly lower my ram disk requirements.  

Justin