Hello,  it seems I have the same problem. 

I cannot send emails, receiving is OK except for one problem - one message now always appears :-

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity.

Subject 'Read: Appeal 2207908 (13/01055/VC) Norfolk Lea'
Server: 'smtp.talktalk.net'
Windows Live Mail Error ID: 0x800CCC0F
Protocol: SMTP
Port: 25
Secure(SSL): No . 

This message was on my inbox, but I deleted it days ago.

On sending, I get no message,  but the email sticks in the outbox.  On doing a send/receive I get a task screen with  :

Send 7 message(s) .............  Failed

The count goes up when I attempt to send.

I am having to use the onetel mailzone website to send mail (my alternative access to my email). 

I don't know if this is due to a Microsoft update as in the original post,  but I do recall a glitch affecting Live mail.  I have installed a later version of Live Mail to no effect.

Any clues please?  

Split from another thread