Earthlink mail outgoing security

Mail
1

I think the problem might be that the outgoing mail security setting is supposed to be “STARTTLS,” which is not available in eM Client 9.0.178.

2

For SMTP, depending on the ports it is:

Port 587 = Force usage of SSL/TLS
Port 25 = Use SSL/TLS if available
Port 465 = Use SSL/TLS on special port (legacy)