I am not able to send email but can receive it properly. The error that I am getting while sending the email is "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". This problem started after I downloaded and installed Norton on my computer. Any help please
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