Could not get into e-mail - kept asking for password - wouldn't accept any -

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

Subject 'Problem'
Server: 'smtp.mail.yahoo.com'
Windows Live Mail Error ID: 0x800CCC0F
Protocol: SMTP
Port: 587
Secure(SSL): Yes

Have no idea what to try next.  Can you help?

Thanks!  Terri