Sounds like a bug. When you turn on debug logging do you see anything specific? (i don’t even know if debug logging is a thing in Lemmy ansible setup). Can you maybe also try with another SMTP client like msmtp to see if you can reach your mail server from it? It’s possible that some network misconfiguration prevents it, or that your mail provider has blocked your IP/range for some reason.

From what i can read here default email.tls_type value is “none” and it’s not overridden in lemmy-ansible. Maybe try this?

I haven’t dug into lemmy setup/code yet but “465” sounds like lemmy is trying port 25 and the server says “no no no what are you doing plz use TLS over 465”