Windows Mail issue_09.13.11

[Herbert77060]

Hello, I am new to this site and about to go bonkers with this email issue. It just began about a week ago. I am no longer able to send mail through Windows Mail. I can receive with no problems. Everything appears to work fine except for sending emails. I called AT&T but according to the "person" I talked with they no longer assist in resolving third party mail problems. I have changed nothing under the accounts tab. Last time I had an issue it was because AT&T had changed something....port number I think it was. I am using port 465 for outgoing mail.

Please help...I have enough to deal with besides email problems.

Thanks.