Prevent a domain from sending emails to the server

Hello,

It is useful to prevent a domain.tld from sending emails to the server.

Good luck!

Welcome @azod Happy you are here

This is the purpose of firewall software. Kindly use them.

Hello,

I mean prevent external emails from being received. For example, all emails from domain.tld will be blocked. There are no options in the firewall to do that.