IT Toolbox
Menu
Français
HomeHow to check a DMARC record
Guide

How to check a DMARC record

Control the presence and policy of a field

TopicIT resources → About 1 min read

Control the presence and policy of a field.

Steps….

  1. Build the name DMARC — Add _dmarc. in front of the domain.
  2. Query the TXT record — Use Resolve-DnsName with TXT type.
  3. Check version — L, registration must start with v=DMARC1.
  4. Read the policy — p=none observation, p=quarantine requests quarantine, p=reject requests rejection according to the DMARC evaluation.

Commands

Resolve-DnsName _dmarc.exemple.fr -Type TXT

Key takeaways

  • Start carefully with a compliance policy if you do not yet master all sources of send.
  • DMARC depends on SPF and/or DDIM alignment.

Related resources

Relevant topic How to create and check a DNS CAA record Restrict authorized certificate authorities without breaking automated renewals. Relevant topic How to check a SPF record Control the FPS published in the DNS of a mail domain Relevant topic How to check SPF, DKIM and DMARC records together The delivability depends on the actual behaviour of the sender and not only the presence of three DNS records. Relevant topic DMARC A policy DNS which combines SPF and DKIM to combat the usurpation of email domains.
Support the development of BAOI Hosting, domains and new IT resources.
❤️ Support BAOI

My favorites