The connection to the server has failed.

Subject 'Re: Fwd: Can this be repaired?'
Server: 'smtp.sbcglobal.yahoo.com'
Windows Live Mail Error ID: 0x800CCC0E
Protocol: SMTP
Port: 25
Secure(SSL): No
Socket Error: 10060

Can someone tell me what my problem is? Everything has worked fine since last Friday.Now I can't send emails out.HELP!