Mail error 504 5.7.4 Unrecognized authentication type

[rishabh]

Have you tried all the steps mentioned here?

Troubleshooting email on a new Discourse install

You just installed Discourse via the install guide, but email doesn’t seem to work. Unfortunately this means you can’t log in as an admin to finalize the install. Let’s troubleshootize! Try the doctor If you run ./discourse-doctor it will check several ways that your mail configuration might be broken, and offer advice. Try that first. Did you enter email settings correctly? The simplest way is to run ./discourse-setup again. Did you enter everything correctly? Y…