When I tested the functionality of my company's smtp server on a Linux terminal, I had no problem sending an email to someone (with or without TLS, both port 25 and 587), but no email can be sent from the Answer server.
I have tried all configuration options (TLS on/off, port 25, 587, with authority or without authority (encrypted Base64 which was successful for sending on the terminal test).
During these failures, I see an ERROR message that says sending email to [email protected] failed: x509: certificate signed by unknown authority.
How can I resolve this situation?
