Sender different from domain

Our phplist installation is hosted on server1.
But we would like to send from an e-mail adres from server2.
So we set it up like this:

when I create a campaign i see:

so I expect a mail from

But instead I get mail from sender but with the email adres from Person in charge of this system (one email address).

How can I send a mail with a sender from the name of our server for email?
Do we have to use smtp?
(by asking this I feel I’m starting to understand what’s happening).


As excepted setting up smtp solved this.