I have an email traffic issue on a new setu that appears to be an external dns issue, but I need some kind of confirmation on this. This is a new install of SBS 2003 and I have run the CEICW with all the correct paramaters. I can telnet to port 25 from within the network, but not the outside world. I have a router with ports forwarded and can connect to the server via vpn, rdp, and owa. Sent mail will also not leave the server, eventually giving a message that the remote server did not respond. The test emails I send from my gmail account come back with 550 550 <email@example.com>: User unknown (state 14) almost immediately. Something strange I see in the NDR is that thw smtp server rejecting has an IP of 10.x.x.x which is a private ip block. I need help with this fat as the Customer is getting rather impatient.