I run into an issue over the weekend.
Environment: Exchange 2003 server with McAfee GroupShield 6.0 as anti-spam.
Lots of user reported that they receive many spams over the weekend.
No emails are scored in Internet Header.
Further, according to the Internet Header, the recipient is userA@mycorp.com, but userB@mycorp.com get it.
Q#1. Does anyone experience similar problem with McAfee GroupShield 6.0?
Q#2. What is your overall experience with McAfee solution? I kind of lose confidence now with it now.
Q#3. Why userB receive userA's email? Is it because the 'To:' address spoofed (meaning the actual recipient is still userB@mycorp.com)? Who's fault for this kind of mis-route McAfee or Exchange? Can someone explain the architecure between McAfee & Exchange?