I am totally confused now... I am using Exchange 2007. One domain is sending me emails from several people to several people here, but the CEO (domain1) can't seem to get an email through to our CEO (ourdomain2)! It's crazy since CEO (domain1) get's the bounce message below, but then can forward me the email without a problem. Any ideas of how I can blanket allow the whole domain1 to send messages without filtering!? Or how to get more details as to why a specific email is bouncing exactly!? Any suggestions would be appreciated. From: Mail Delivery System Date: Wed, 25 Jun 2008 10:46:43 -0400 (EDT) To: DebMC Subject: Undelivered Mail Returned to Sender This is the Postfix program at host 1234.xxx.ca. I'm sorry to have to inform you that your message could not be be delivered to one or more recipients. It's attached below. For further assistance, please send mail to <postmaster> If you do so, please include this problem report. You can delete your own text from the attached returned message. The Postfix program : host xmail1.xxx.com[20x.x.x.x] said: 550 5.7.1 Message rejected as spam by Content Filtering. (in reply to end of DATA command) ------ End of Forwarded Message