Why would a Site and Content filter rule prohibit a SecureNat Exchange server from resolving DNS queries? All the packet filters are in place..all the correct protocol rules are in place from running the Secure mail server wizard. However when I enable any of my Site and content filter rules DNS resolution on the exchange server fails. When I go back and enable the "Allow Any" site and content filter rule....DNS resolution works fine. Once I disable that Allow all External rule....DNS resolution fails. There are other Site and Content rules setup..but I cannot for the life of me figure out what I have to enable to allow DNS resolution to occour other than enabling the "allow all" Rule. Brian W. Rogers MCSE, MCT, MCP Client/Server Network Developer Tree of Life Corporation RogersB@xxxxxxxxxxxxxx office: (904)810-7334 mobile: (904)307-1990 "Failure is not an option. It comes bundled with the software"