For some reason, I cannot get our private mail server to work with openproject. It keeps throwing a “Net::ReadTimeout” error.

Here’s my config (filtered):
production:
email_delivery_method: “smtp”
smtp_address: “smtp.*”
smtp_port: 465
smtp_domain: “smtp.*”
smtp_authentication: “plain”
smtp_enable_starttls_auto: true
smtp_user_name: “*”
smtp_password: “*”
ssl: true

I’ve tried with and without ssl: true, I’ve tried both true and false for starttls_auto, tried “plain” and “login” for authentication- nothing works. Port 465 is allowing incoming and outgoing in iptables, and I can telnet the server, so it’s not being blocked.

I’ve searched everywhere, and all I can find are plain port 25 examples and gmail tls examples.

Does anyone else use a mail server on port 465 that is SSL and not TLS? Can you tell me what you did to make it work? Thank you very much!