I have a user that is complaining that she is not receiving mail from BCI.NET, a-znet.com and a person at juno.com. When I do nslook's on the domains in question, there setup looks OK to me. Can someone help as to where/how to resolve this. I am running Exchange 2003 sp2 on Windows 2003 sp2 with IMF and reverse DNS lookup. <<nslookup.doc>> Todd Lemmiksoo Network Administrator All-Mode Communications, Inc. 1725 Dryden Road Freeville, New York 13068 (607) 347-4164 x440 1-877-ALLMODE (toll free) http://www.all-mode.com