How to check mail.ru addresses in php?

Question

PHP

Hello.
I'm writing a class to check email addresses. Yandex, Jimil, Rambler, he checks. But if you check mail.ru, it always writes "exists". That is, the server response is always 250.
I understand that the mail did this somehow on purpose. But maybe there is a loophole and you can find non-existent addresses?

Answer 1

The easiest way to check the existence of a mailbox on mail.ru is through password recovery.
It there accurately returns the answer that the box does not exist.