This is not presently a critical issue, but it is surely a pain in the ..., well. A few of our users and all new users being created are unable to send to the "All" distribution list. They have no problem sending and receiving to other lists, however. ***** The following is the NDR that is generated: Your message did not reach some or all of the intended recipients. Subject: Test - please delete Sent: 7/16/2003 2:36 PM The following recipient(s) could not be reached: All on 7/16/2003 2:36 PM The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator. <it-adfw1.alibre.com #5.0.0> ***** I researched the Microsoft site for assistance to isolate this problem, but the error 5.0.0 is too generic. They suggested installing SP3 to get additional error reporting; however, I already have ExchSvr2k SP3 applied. Any feedback you might have on this would be appreciated. Thanks! Camey Psaromatis cameyp@xxxxxxxxxx