How to setup custom MAIIL FROM Domain also known as envelope sender in postfix

Hi I have installed postfix and configured it using this tutorial:

The only problem is that I cant set a custom MAIL FROM or envelope sender.
Please help me.

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Hello there,

May I ask if what you try to achieve is to send the emails from a custom mail address like and not be marked as sent from the server’s hostname?

If that is the case you need to add the domain in the Postfix config file - /etc/postfix/ and if you want to configure forwarding as well you can add the actual forwarding in this file - /etc/postfix/virtual


This will forward the emails from to

Hope that this helps! Regards, Alex