Set Up OpenDMARC with Postfix on Ubuntu to Block Email Spoofing/Spam

In previous articles, we discussed how you can quickly set up your own mail server by using iRedMail or Modoboa, and also several effective tips to block email spam. This tutorial will be showing you how to set up OpenDMARC with Postfix SMTP server on Ubuntu to block email spoofing and spam. OpenDMARC is an open source DMARC email policy filter for MTAs (Message Transport Agent, aka SMTP server).

Read the full guide here: https://www.linuxbabe.com/mail-server/opendmarc-postfix-ubuntu