cannot send emails

I am using COX and Windows Mail and have followed all directions for changing
the outgoing mail Server Port Number (SMTP) settings from 25 to 465, checking
This server requires a secure connection (SSL)on the ADVANCED TAB and also
checking "My server requires authentication" for the Outgoing Mail Server
(and setting it up with "log in" supplying my user name and password on the

Even so, I still get this error message when trying to send outgoing mail:
The connection to the server has failed. Subject 'testing 2', Account: 'Cox',
Server: '', Protocol: SMTP, Port: 465, Secure(SSL): Yes,
Socket Error: 10013, Error Number: 0x800CCC0E

Everything was working fine previously, but when I kept getting the error
message, I changed the settings as I indicated above and still cannot send