Hello I've got an exchange 2003 server,working on a dynamic ip adress (yep, i'm poor) ,I've got the receiving of email going through DynDns.org. That's going great rerouting to port 52525 and opening my router on that port and having smtp listen on same port. For the Outgoing, well, ican't seem to put my finger on it, i want exchange to send the mail to my isp smtp server on their port 25. Where and how do i pull this one off? Done it on other mail systems but i'm new to exchange 2003.