Adding multiple e-mail alias addresses to an account

Question

Can someone please tell me how to add another e-mail address to my Mail account. I have tried using info from the Mail Help file, both "adding another account" and "adding multiple e-mail alias addresses to an account". Each time when I try to send a test message to or from the added e-mail address, I get the same message: "Cannot send message using the server mail.bellsouth.net. Use the Pop-up menu below to try a different outgoing mail server". The only pop-up is smtp .Mac.
I have tried both methods shown in the HELP file and get the same message. I would really appreciate your help.

Answer 1

Are you trying to add a second email account to Mail, or just add a second "(apparently) from" address to an existing account?
If the former, we need to know some more detail, like:
(1) who is the existing account, .mac or bellsouth?
(2) Which are you trying to add, .mac or bellsouth?
(3) I assume your ISP is Bell South?
(4) What are the names of the smtp servers and what are their respective smtp server port numbers?
(5) Are either of them using SSL on the smtp server?
(6) I don't remember whether Tiger Mail has it or not, but in Leopard Mail, on the menu bar under "Window" there is a selection "Connection Doctor." If applicable to Tiger Mail, what does it say about your connections?
(7) Which account can you send mail through and which one can't you send mail through?
(8) Are your receiving mail okay through either or both accounts? Which one(s)?
Now if you are trying to add a second "(apparently) from" address to an existing account, in Mail Prefs > Accounts > mail account > Email Address, just add a second email address separated by a comma like so:
   [email protected], [email protected] 
You could have an issue with bellsouth or .mac requiring the domain name in the apparently from email address to match the domain name of the smtp mail server.