Postmastery helps protect your brand against spoofing and phishing with DMARC.

DMARC tells a receiver what to do when authentication is missing or failing for a specific From: header domain. DMARC should primary be seen as a security measure for senders susceptible to spoofing and phishing. Additionally, DMARC compliant senders are rewarded with email delivery preferences at top tier providers such as Google, Yahoo, Microsoft and AOL.


Is your email marketing DMARC compliant?


DMARC Compliance Testing

With EmailAudit.com, Postmastery provides a free service, where your emails will be evaluated according to several authentication systems and more. Just send an email message from the domain you wish to check, and a report will be sent back.

We look at the following

  • Server configuration
  • SMTP envelope
  • SPF authentication
  • Mail header fields
  • DKIM authentication
  • DMARC compliance

Each aspect contains a number of checks. The results are very detailed and show the source of a problem. No guesswork is needed to fix issues!

DMARC Report Processing

As soon as a DMARC record is published in your DNS, ISP’s will start sending you XML files with information whether messages are passing or failing. Postmastery developed a tool to retrieve the XML reports from a mailbox and convert them into easy to read Excel overviews.

The basic pass/ fail data from the ISP’s is enriched with additional information to simplify the analysis process.

Since the tool runs on your desktop, there’s no need to share sensitive data with online reporting tools.

DMARC Implementation Service

Postmastery’s DMARC deployment service pack offers a full implementation of DMARC on one or more domains.

We follow this 5 step approach

  1. Base line measurement: Publish a DMARC record with the “none” flag set for the policies, which requests data reports.
  2. Identify legitimate email sources and compliancy issues.
  3. Provide guidance in fixing compliancy issues (authentication, alignment).
  4. Periodically check the reports to monitor progress.
  5. Move to a “quarantine” or “reject” policy.

DMARC is complex and has a big impact on your domain. Don’t shoot yourself in the foot and get support from the first-time DMARC experts.