Integrate OpenDMARC in iRedMail


This is still a DRAFT document, do not apply it on production server.

What are DMARC and OpenDMARC?

Quote from

DMARC, which stands for Domain-based Message Authentication, Reporting & Conformance, is an email authentication, policy, and reporting protocol. It builds on the widely deployed SPF and DKIM protocols, adding linkage to the author (From:) domain name, published policies for recipient handling of authentication failures, and reporting from receivers to senders, to improve and monitor protection of the domain from fraudulent email.

OpenDMARC is a free open source software implementation of the DMARC specification. Source code hosted on GitHub.



OpenDMARC version 1.3.2 (or later) is required (version 1.3.1 is buggy).

Supported OS Linux/BSD distributions:

Distribution Releases Comment
CentOS 6, 7 Yum repo epel is required.
Debian 9, 10
Ubuntu 18.04 16.04 ships OpenDMARC-1.3.1 which is buggy.
OpenBSD The latest 6.5 release doesn't offer opendmarc binary package.
FreeBSD 11.x, 12.x Port mail/opendmarc.

Install OpenDMARC

yum clean metadata && yum install opendmarc
apt-get update && apt-get install opendmarc
pkg_add opendmarc
cd /usr/ports/mail/opendmarc && make install clean

Configure OpenDMARC

Setup cron jobs