I've used the same settings for years.  I suddenly cannot send e-mails.  Receiving them just fine.  The following is the error message that I received.  Tried suggestions posted on forum and none solved the problem.  Nothing changed on my computer and nothing changed at ISP. 

The connection to the server has failed.

Subject 'Test 1'
Server: 'mail.mchsi.com'
Windows Live Mail Error ID: 0x800CCC0E
Protocol: SMTP
Port: 25
Secure(SSL): No
Socket Error: 10060