I’ve been scouring the web and eventide.net and Microsoft for some answers here, can someone point me in the right direction. I’m getting the above mentioned failures recorded in my exchange log from legitimate email sources. How do I go about tracking these messages and trying to find out why they are not getting to my end users mailboxes and what is causing this failure? Thanks Jeff --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.766 / Virus Database: 513 - Release Date: 9/17/2004