In reviewing a similar but different issue I thought this might help, Not
certain why now but here is the link.
http://forums.mcafeehelp.com/viewtop...ht=cache+email

Has to do with
My outgoing server (SMTP) requires authentication

good luck.

My issue is... I think McAfee is caching the outgoing messages. I have sent
a message that is to large and i think that it needs to be deleted from the
cache.