I have Exchange Server 2003 SP1, soon will be upgraded to SP2. I also have spam filter set up, but it doesn't provide Regular Expression filtering.
What I'm looking for is if there's a way to filter emails based on regular expression and send spams to the receiving user's Junk E-mail folder in Outlook. I am trying to implement this not using any spam filter software(If it's not free), but with some code works which can be applied to Exchange Server.
Does anyone have any experience with this? I'm sure many people had felt regular expression is very effective on filtering emails.