All of a sudden, Live Mail can't send my outgoing messages, because it says my outgoing server address is incorrect.  I have checked my account settings and the address is correct there, but Live Mail shows it with an extra letter in the error report.   How can I fix this?

I have been unable to send or receive e-mails for 4 days now and no one at Microsoft has been able to answer my question and they keep referring me to other sites or tech desks without any answers coming forward and I keep going around in circles.  The error codes are shown above.  Can anyone help me bearing in mind I am a novice computer user?