Two mails on one domain, DKIM, DNS?

Question

Domain Name System

Hello. Please tell me how to be right? Completely confused.

There is a domain.com domain and a subdomain, two.domain.com
For these two domains, I want to create different mails, and make them a DKIM signature

. That is, so that it is like this
[email protected]
[email protected]

It turns out I'm in my Cpanel I add these domains and generate DKIM keys, then I go to DNS and paste the generated data there.
Actually, I did all this, but the letters still come to the post office unsigned.

What am I doing wrong? DKIM,SPF,PTR data, I registered in the DNS of the main
Yandex domain when I received a letter, it says "there is no signature, there is encryption"

What did I miss?

Answer 1

You missed the mail server settings. He must sign all letters with the private key.
You add the public key from the key pair to DNS, and sign letters with the private key.
In the case of linux servers, opendkim is usually used for signing