After much Go code spelunking:
I guess a fix has to be made to statping but generally I prefer changing the platform to adapt to the app unless it's an outright bug. So, I am going to see if I can fix our mail server.
Notes to future me:statping always sets mailer.SSL to fase. This means port 2465 can never work Ultimately, go-mail in turn uses net/smtp which won't send passwords with TLS