After updating to Mountain Lion from Lion, my mail app cannot connect to the SMTP server provided so, I cannot send emails although I receive mails.
I reenter all data for the e-mail account, I restarted my MacBook and the problem still stands.
I called the Internet provider to check if they have some system problem but I was told that everything is in order with my account.
Once I try to send an e-mail a box from mail appears suggesting change of SMTP server or recheck of the validity of info provided.
Everything is entered correctly and, the problem remains.
Can somebody please, help?!
Believe it or not I found a solution and, as it ususally is at the last place I thought possible.
I manually put one of the default ports numbers (25, 465, 587) as a custom port.
Mail>Preferences>select the account>go to Outgoing Mail Server (SMTP): select Edit SMTP server list....>Advanced>select Use custom port: add any of the default port numbers, listed in the previous (above) option of Use default ports (25, 465, 587). I used 25.
So, insted of selecting Use default ports (25, 465, 587) select Use custom port: 25.