E-Mail Authentication Error 535

Hi all, I’ve been trying to configure a Discourse instance over the last day or so. I’ve managed to get it working, but keep having an issue with sending out emails as it returns an authentication error code of 535. I’ve tried multiple servers and still get the same code. I’ve just spoke to Dynadot (my email provider) and they said the setup is all good on their end, and that I should ask here for support. Any comments/tips would be appreciated. Thanks in advance :grinning:

I’m able to telnet the SMTP server, so I dont believe its a connectivity issue there.

Heres an image of my config with the credentials taken out, if this is of any help.

Did you look up the meaning of that error code?