smtp relay

  1. Port 25 works - 587 Does not SMTP

    So we are setting up an on premise server. We are relaying email to our Mail Enable server. If I un-check TLS/SSL and dont use a user name or password, mail is sent from 3CX. Fine, that is expected. If I check TLS/SSL, I get a message that the operation was cancelled. I get this with or without...
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