Why do not receive letters from the site to corporate mail?

Question

PHP

Hello! Created a corporate mail on Yandex. I sent a letter to her from another account - it works, I sent a letter from her to another account - it also works.
But the task is to get data from the site via the php mail function to this corporate mail. Sending works fine if you enter other mail, but it does not work for corporate mail. What could be the problem?

Answer 1

Check via https://www.mail-tester.com/

Answer 2

If the mailbox address after the dog has a character set that is absolutely equal to the domain name))), then for 80% of the servers it will be considered as a prohibited operation, that is, sending to myself, for example, on the timeweb and running they answered that this qualifies as launching an unwanted script like spam machines, write to the hoster and don't be fooled - forget about php_mail!