How to add mail on your domain to Mail.ru?

Question

Mail for domain

Hello! I want to make mail on my domain, through the Mail.ru service: https://biz.mail.ru/mail/
I connected everything, set everything up. I'm trying to add mail like [email protected]_domain.com , it gives me: prntscr.com/i09zvf
It's not clear where it is reserved, I couldn't find it anywhere. Who connected tell me?

Answer 1

The [email protected] mailbox in a domain is role-based according to RFC 2142, and certain functions may be available for it, such as confirming the issuance of a domain certificate, for example. The same mailboxes are, for example, [email protected] and [email protected]
Therefore, access to the [email protected] box should not be given to just anyone. The warning is about this, otherwise you can wind it up and use it like a regular box.