[otrs] smtp problem

We changed from our Postfix on Linux mail server system to Exchange also a few weeks ago, and it killed our mail notification. Our new IT security policy probably means that OTRS never will be routed through exchange. I have been looking at alternative solutions, specifically setting up sendmail on the same server as OTRS and using it as our outgoing server. I am monitoring this discussion closely and ask that if you find a solution, please post it to the newsgroup. Thanks