i have exch 2007 sp1 enterprise. all server roles in one server. and installed microsoft forefront security for exchange SP1.
my problem happens when i try to send a large mail ( > 1 Mb) in about 90% of transfer i get the error "connection to the server was interrupted" and sending fails.
i don't know where the problem is!! if i tried the same scenario with OWA, i have no problem.