[otrs] SMTP Woes

Hi all, I'm trying to set up customer notifications with OTRS 2.4.5 on Windows Server 2003 (fully updated). The Domain Controller is on a separate server, and the Exchange 2003 is another separate server. This is probably an issue I'll have to take up with my boss (I'm a lowly college intern), but for some reason SMTP and our Exchange server just refuse to cooperate. But, if I use my GMail credentials and tie it to Google's servers, it works just fine. I would use GMail, but my other boss says that would be a little too kludgy, and would make the town administrators next door upset if they found out (town politics are a mess). Thanks for all your help as always! Justin Holt Town of Vernon IT Intern