Plesk doesn't received emails

Hi everybody,

I have a virtual server with centOS 7 and Plesk 12.5.30 and I have a domain in Cloudflare connected to the server.
The server is a new installation. I created an email from my domain and accessed from webmail I can send but I cann't receive emails.

I executed "plesk repair mail" but it has not helped.

Please help me, I have read all google about this.... :'(

Cloudflare DNS configuration:

A myrealdomain.com points to 82.***.**.**
A mail.myrealdomain.com points to...

Plesk doesn't received emails