SMTP Settings @ mxroute

How to Use GitLab Self-managed
1

Hello everyone,
I’m trying to setup smtp settings for a host that is not on the list settings provided. Is there any documentation that covers how to determine the proper smtp settings? I’ve tried tons of combinations and haven’t been able to find any that work. Lastly, is there any logging about what is happening that I could use to help figure out the issue? At this stage all I know is that the emails are not getting sent. My last attempt at settings is as follows :

gitlab_rails['gitlab_email_enabled'] = true

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "shadow.mxrouting.net"
gitlab_rails['smtp_port'] = 993
gitlab_rails['smtp_user_name'] = "user@example.com"
gitlab_rails['smtp_password'] = "XXXXXXX"
gitlab_rails['smtp_domain'] = "example.com"
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true

gitlab_rails['gitlab_email_from'] = 'user@example.com'
gitlab_rails['gitlab_email_display_name'] = 'User Example'
gitlab_rails['gitlab_email_reply_to'] = 'user@example.com'
2

Still not getting emails. Mxroute says my settings are correct. To confirm, I did run

gitlab-ctl reconfigure
gitlab-ctl restart

I attempted this and got nothing

irb(main):001:0> Notify.test_email('user@example.com', 'Important Message Subject', 'Can you please email me back once you get this').deliver_now
Delivered mail 663939f91140d_360b622cec9176e@gitlab.mail (60173.3ms)
/opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/net-protocol-0.1.3/lib/net/protocol.rb:219:in `rbuf_fill': Net::ReadTimeout with #<Socket:(closed)> (Net::ReadTimeout)
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/net-protocol-0.1.3/lib/net/protocol.rb:193:in `readuntil'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/net-protocol-0.1.3/lib/net/protocol.rb:203:in `readline'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/net-smtp-0.3.3/lib/net/smtp.rb:1057:in `recv_response'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/net-smtp-0.3.3/lib/net/smtp.rb:659:in `block in do_start'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/net-smtp-0.3.3/lib/net/smtp.rb:1067:in `critical'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/net-smtp-0.3.3/lib/net/smtp.rb:659:in `do_start'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/net-smtp-0.3.3/lib/net/smtp.rb:611:in `start'
        from /opt/gitlab/embedded/service/gitlab-rails/config/initializers/mail_starttls_patch.rb:53:in `start_smtp_session'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/mail-2.8.1/lib/mail/network/delivery_methods/smtp.rb:100:in `deliver!'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/mail-2.8.1/lib/mail/message.rb:2145:in `do_delivery'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/mail-2.8.1/lib/mail/message.rb:253:in `block in deliver'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/actionmailer-7.0.8.1/lib/action_mailer/base.rb:588:in `block in deliver_mail'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/activesupport-7.0.8.1/lib/active_support/notifications.rb:206:in `block in instrument'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/activesupport-7.0.8.1/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/activesupport-7.0.8.1/lib/active_support/notifications.rb:206:in `instrument'
        from /opt/gitlab/embedded/lib/ruby/gems/3.1.0/gems/actionmailer-7.0.8.1/lib/action_mailer/base.rb:586:in `deliver_mail'
        ... 17 levels...
3

Port had to be 2525. smtp_authentication had to be login. Working now.