Set Postfix as Open Relay

Hello together,

here a little Explanation on how to set the Postfix MailServer as an Open Relay SMTP Server.

Just edit the File „etc/postfix/“ and change the following line:

mynetworks =


mynetworks =

then restart the Postfix MailServer – like:

sudo service postfix restart

Now your Mail Server is an Open Relay.

You should only do this for Test Purposes. So It would be a major security Risk!


Have Fun!

Greetings burncycle