I have 3 exchange 2003 on windows 2003 all SP1 servers in 3 physical locations, I've been having problems with mail queues saying "the remote server did not respond to a connection attempt" for mail on my internal server queues, which I have yet to solve. My question is MY company's AD DNS namespace is company.com. All my AD servers and 2 of the 3 Exchange servers live in the DNS zone company.com The 3rd exchange server which is the routing group master lives in a sub zone of company.com called corp. (exchange server.corp.compy.com) There is a Host record for the Exchange server in question in each zone. Does anyone see this a being a problem, or could this be why I'm getting the errors on my mail queues? Thanks, Mike