Yandex smtp mail not send

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I found an old email from Yandex when I was texting to solve this problem. Here it may be useful.

The “Sender address rejected: not owned by user” error that occurs when sending a letter indicates an attempt to send a letter using someone else’s or another mailbox. There are two situations in which such an error can occur:

  • In case the letter is sent with the indication of another mailbox, but within the same domain.
  • If the letter is sent with the indication of a different mailbox using a different domain.

Please note: the error will indicate the mailbox in which the authorization was performed, and the mailbox that will be indicated as the sender:

(5.7.1 <admin@example.com>: Sender address rejected: not owned by user mail@example.com)
  • admin@example.com - the mailbox in which the authorization was performed.
  • mail@example.com is the mailbox specified as the sender.

My solution was that one e-mail was specified everywhere. This e-mail is registered on Yandex. Connect.