I had to restore my system because of an internal error..everything is fine now except for my Outlook Express mail program, which gives me this error message every time I try to send out mail:
The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was 'firstname.lastname@example.org'. Subject 'test', Account: 'email@example.com', Server: 'smtp.att.yahoo.com', Protocol: SMTP, Server Response: '553 From: address not verified; see http://help.yahoo.com/sbc/dsl/mail/pop/pop-11.html'
, Port: 465, Secure(SSL): Yes, Server Error: 553, Error Number: 0x800CCC78
What do I need to do to be able to send mail from this program again?