I have two domains. the first one example.comand the second example.it
I'm running on a droplet iRedMail server.

the first one is the principle and I have created email as this myname@example.com.

you know if it is possible perhaps by writing a dns records set, addressing the second domain to the first one? for example if someone send an email to myname@example.it, it is sent automatically to myname@example.com. something like an email domain alias