Why in cloudflare, when sending mail to email addresses in my domain, the letters simply do not reach?

Question

Domain Name System

Hello!
Connected CloudFlare for the site. Everything works except mail. Now, when sending mail to email addresses in my domain, letters simply do not reach. I read their manual, but it didn't really help. It is necessary to somehow set up dns and Mx so that letters reach?
Anyone can help?

Answer 1

Create an MX record that points to your server directly (not to an ip address, but to one of the domains that looks at this ip).
For example, for Yandex it would be mx.yandex.ru