SMTP do not work

I use SMTP beget, via telnet emails are sent, but discourse can’t send the email.
Ports tried 25, 2525, 465 (587 - not supported)
SMTP user - admin@DOMAIN.com
What could be the reason?

Log:
Creating scope :open. Overwriting existing method Poll.open.
Rendering layouts/email_template.html.erb
Rendered layouts/email_template.html.erb (Duration: 1.2ms | Allocations: 30)
Delivered mail 576bff71-b5c9-434c-ab08-3ee0bcbd7920@forum.DOMAIN.com (69.7ms)
Job exception: 504 PLAIN authentication mechanism not supported

Help me please, I’m sad :frowning:

Try this

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And this: Troubleshooting email on a new Discourse install

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