You are going to have to contact their postmaster - this means that the remote mail server is classifying your e-mail as spam. You can't directly change that. Verify (dnsstuff or similar) that you aren't on any black-lists. That's about all you can do other than contact the 'far side'. Regards, Michael B. Smith MCSE/Exchange MVP http://TheEssentialExchange.com From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Jason Davis Sent: Thursday, January 17, 2008 2:32 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] NDR -- EVENT ID 3030??? Please help... Hello all, I need some expert advice... I'm receiving the following error on my Exchange 2003 server's EVENT VIEWER: A non-delivery report with a status code of 5.7.0 was generated for recipient rfc822;AdnanKAPIC@xxxxxxxxxxxxxxxxxxxxxxxxxx (Message-ID <E772B4FC86870542AFE731C38E0CE13F028A5D@xxxxxxxxxxxxxxxxxxxx>) The NDR which the sender is getting back looks like this: "The following recipient(s) could not be reached: AdnanKAPIC@xxxxxxxxxxxxxxxxxxxxxxxxxx on 1/17/2008 11:05 AM The recipient could not be processed because it would violate the security policy in force <mail2.csical.com #5.7.0 smtp;554 5.7.0 Reject, id=17964-20 - SPAM>" The message tracking logs were not much help, either: This is the only sending address which has caused this problem. The user can send to this email address using a Web-Based account (i.e. Gmail) with success. However, when sending from Exchange server, the same address generates a NDR. Any advice would be greatly appreciated! Thanks in advance!!! --Jason Davis JDavis@xxxxxxxxxx