I believe only one of your email accounts wants the non standard port number 587. The rest of your accounts probably want to use the standard port number 25. So if you changed all your email accounts to the new 587 number that maybe why their not working... Doug LaBore On 3/7/07 7:48 PM, "Neil" <lists at mac.com> wrote: > On Mar 7, 2007, at 12:27 PM, Neil_ Pollack wrote: > >> Mail doesn't send messages any more. It just puts the message in >> the out box. At first, it would ask me if I wanted to try another >> server, which sometimes worked, but not anymore. I have the same >> problem with my ISP (BellSouth) and .Mac e-mail accounts. I >> changed the port setting to port number 587. I tried checking SSL >> on and I tried it off. Does anybody have any other suggestions? >> Meanwhile, I have to send from the .Mac web interface. Thanks. > > By the way, I'm running Mail 2.1 on Mac O/S 10.4.8.