We use Exchange 2003 (SP2) with Trend Micro ScanMail for SPAM/Virus Filtering. We have a real problem with SPAM getting through the filter! I noticed in the real time ScanMail log it show messages found at SMTP. Does this mean Exchange is accepting email from SMTP? I pasted two examples below..
4/6/2007 12:08:33 PM - Message from "email@example.com" found at "SMTP" [total 1 recipient(s)]
4/6/2007 12:06:25 PM - Message from "firstname.lastname@example.org" found at "SMTP" [total 1 recipient(s)]