According to Yahoo:
http://help.yahoo.com/l/us/yahoo/mai...op/pop-30.html
your port setting is wrong. It should be 465 instead of 25.

Gary VanderMolen

"Tim Smith" <Tim Smith@discussions.microsoft.com> wrote in message news:9F2840F2-E893-4365-96A2-CB8BECE8C4A5@microsoft.com...
>I have configured and reconfigured my pop address and server settings and
> cannot get Windows(Vista) Mail to send mail. It had no problem receiving all
> my mail outta my Yahoo account though! I do pay for my Yahoo account, it is
> not the FREE one!
>
> Here is the error I'm receiving:
>
> Your server has unexpectedly terminated the connection. Possible causes for
> this include server problems, network problems, or a long period of
> inactivity. Subject 'Trying to purchase a set of non-rx lenses, Please
> help!', Account: 'pop.mail.yahoo.com', Server: 'smtp.mail.yahoo.com',
> Protocol: SMTP, Port: 25, Secure(SSL): Yes, Socket Error: 10053, Error
> Number: 0x800CCC0F
> Please help!