[SMTP: Failed to connect socket: Connection timed out (code: -1, response: )]

ahmedvolks · Jul 24, 2020

Hello,

I have a postfix mail server, and system OSticket.

It was working fine. but after install new OSTicket system. I stuck in SMTP setup with the below error.

Failed to connect to mail.domain.com:465 [SMTP: Invalid response code received from server (code: -1, response: )]

ntozier · Jul 24, 2020

It says "Connection Timed out". That would indicate either a dns issue looking up the server and it timed out, or a firewall or security package blocking the request.