Contact Form 7 does not send emails. What to do?

Question

SMTP

So, I set up mail for the domain via Yandex Connect, changed mx and cname on the hosting for Yandex.
Mail works, letters from it are sent and received.
And the form contact is junk, it sends letters to the mail like yandex .ru without problems, but nothing comes to the domain mail.
What is the problem and how to fix it?

Answer 1

sends letters to mail like yandex.ru without problems

The problem is not in CF7