http://www.msexchange.org -------------------------------------------------------Hello all, I've recently migrated from Exchange 5.5 to Exchange 2003 and suffered through quite a scare due to thousands of NDR's filling my mail queue. Some research led me to the following KB Article: http://support.microsoft.com/kb/909005 This seemed to clear up my problem. Also, I've done some research on how to avoid being a mail relay. Hopefully, all is good now. However, I wanted to query the "experts" (you guys!) in what are the 'best practices' for locking down your Exchange 2003 server. Do any of you have some good KB Articles or links which might help me? I've been informed to use "Recipient Filtering." Do any of you have additional advice in securing my email server? Just to let you know, I'm running Exchange 2003 (SP2) on a Windows 2003 server (SP2) with GFI Mail Essentials for killing SPAM and Norton Anti-Virus for Exchange V.5. I am NOT running any file Anti-Virus software. Thanks for any input, in advance! --Jason Davis JDavis@xxxxxxxxxx ------------------------------------------------------- List Archives: //www.freelists.org/archives/exchangelist/ MSExchange Newsletter: http://www.msexchange.org/pages/newsletter.asp MSExchange Articles and Tutorials: http://www.msexchange.org/articles_tutorials/ MSExchange Blogs: http://blogs.msexchange.org/ ------------------------------------------------------- Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------- To unsubscribe visit http://www.msexchange.org/pages/exchangelist.asp Report abuse to listadmin@xxxxxxxxxxxxxx