Since yesterday, 1/12, I have not been able to send email (no replies, no forwarding, no new messages go out); however, I am still getting messages.  Anytime I try to send a message, it goes to my Outbox and stays there until I delete it. 

With a message in my Outbox, when I try to send/receive email, I get the folowing error: 

The conection to the server has failed 

Subject 'testing my outgoing mail' 

Server: 'smpt.comcast.net'

Windows Live Mail Error ID: 0x800CCC0E

Protocol: SMPT, Port: 25

Secure(SSL): No

Socket Error: 10013

I got my last Microsoft updates on 01/09/2013, but I was still able to send messages on 01/11/2013; so I don't think this problem is due to updates. 

When I log on to my email account on the comcast website, I am able to send messages from there.

I tried changing the port number to 587, which was a suggested possible solution, but this did not help.

Any help would be greatly appreciated.  Thank you.