How to configure exim4 to receive mail from outside?

Question

Exim

Hello.
I need to create an MX record for my domain (3 levels) so that outgoing mail will pass any spam filters.
To do this, I need to somehow organize the receipt of mail on this subdomain (?)
Sends mail from me exim4
But I still could not find a manual how can I use it to receive mail?
And what to write in the MX record.
Please help with a link.