I can receive e-mail, but get the following error when I try to send. I am
using Outlook.... also, I recently downloaded/installed Norton 360.

An unknown error has occurred. Subject 'E-Mail TEST', Account:
'mail.charter.net', Server: 'mail.charter.net', Protocol: SMTP, Server
Response: '421 charter.net connection refused from [75.215.34.235]', Port:
25, Secure(SSL): No, Server Error: 421, Error Number: 0x800CCC67