How to manage ubuntu server mail addresses?

Question

Django

I can't find a clear answer to my question.
There is a dedicated server on which Ubuntu is installed. Nginx rolled onto the server, a couple of PHP sites and several Django are spinning.
How to manage (create) mail, from which, for example, notifications will be sent to the user (that he has registered, or just a message from the site to the admin). That is, how to create an address like [email protected], [email protected]?
I noticed that if you create some "left" address, like [email protected], then the mail arrives for a very long time. If the form is [email protected] - then immediately.
Thank you.

Answer 1

mess around and set up postfix and dns Feng Shui records
or
use a third-party service