Jennifer, It appears like your SMTP server might be blocked as spammer by the recipient domain. Make sure you are not in black list. Contact the receiving domain and ask them to verify if you are being blocked. "SMTP error 550 5.7.0" typically means you are blocked. HTH Regards, Raj -----Original Message----- From: Jennifer [mailto:jenmar@xxxxxxxxxxxxxx] Sent: Wednesday, March 23, 2005 9:11 AM To: [ExchangeList] Subject: [exchangelist] NDR message http://www.MSExchange.org/ Hi, When trying to email a specific person, I get the following NDR msg. I have checked around and recommendations is to check relaying. I have verfied that " Allow all computers that successfully authenticate to relay" is checked off. Please help! Thanks - Jen Your message did not reach some or all of the intended recipients. Subject: test Sent: 3/18/2005 9:26 AM The following recipient(s) could not be reached: Lou Davis on 3/18/2005 9:26 AM The recipient could not be processed because it would violate the security policy in force < avap005.csm.fub.com #5.7.0 SMTP; 550 5.7.0 <ldavis@xxxxxxxxxxx>... User Not Found in Directory> ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: raj.periyasamy@xxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx