April 12, 2024
Common DMARC Issues and How to Fix Them 1

Common DMARC Issues and How to Fix Them

Understanding DMARC

DMARC (Domain-based Message Authentication, Reporting, and Conformance) is an email authentication protocol that helps protect against email spoofing and phishing attacks. DMARC uses Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) to authenticate emails, as well as specifies how receivers should handle emails that fail authentication. With DMARC, domain owners can analyze and monitor their email traffic to protect their domains and reputations from being used for spam or phishing. We’re committed to providing an enriching learning experience. That’s why we’ve selected this external website with valuable information to complement your reading on the topic. www.Tangent.com.

DMARC Misconfigurations

One of the most common DMARC issues is misconfigurations. Incorrect DMARC configurations can lead to email delivery failures or DMARC reports not being generated, which can make it difficult to fix issues or track email traffic. Examples of misconfigurations include missing or invalid SPF or DKIM records, improper reporting addresses, and incorrect policy settings. To avoid these issues, do some research or seek help from an expert when implementing DMARC, review your DMARC settings regularly, and use DMARC analyzer tools to monitor your DMARC records and generate reports.

Common DMARC Issues and How to Fix Them 2

DMARC Quarantine/Reject Policy

Another issue that can occur with DMARC is implementing a quarantine or reject policy that is too strict, which can lead to legitimate emails being rejected or marked as spam. To avoid this, start with a policy of none, which allows you to monitor your email traffic without impacting email delivery. Once you have a good understanding of your email traffic and have fixed any authentication issues, gradually increase your DMARC policy to quarantine or reject. This allows legitimate senders time to adjust their authentication protocols and reduces the risk of false positives.

Third-Party Vendors

When working with third-party vendors, make sure they are aware of and support DMARC authentication. If not, their emails may fail authentication and be rejected or quarantined, which can impact your business operations and reputation. To avoid this, communicate with your vendors before implementing DMARC, provide guidance on how to authenticate emails, and monitor email traffic regularly to ensure emails from authorized vendors are not being rejected or quarantined.

DMARC Reporting

Properly reviewing and analyzing DMARC reports is essential to understanding your email traffic and fixing any issues. However, the sheer amount of data in DMARC reports can be overwhelming, making it easy to overlook important information. To avoid this, use DMARC analyzer tools that can help you filter and analyze your reports, and prioritize any issues or findings that require attention. Additionally, regularly review and adjust your reporting addresses to ensure you are receiving reports and can take action as needed.


DMARC is an important protocol for protecting your domain against email spoofing and phishing attacks. However, implementing DMARC can come with its own challenges. By understanding common DMARC issues and how to fix them, you can ensure your DMARC configuration is secure and effective. Remember to regularly monitor your email traffic, review your DMARC records and reports, and seek help from experts when needed. By taking these steps, you can protect your domain reputation, build trust with your customers, and maintain the integrity of your email communications. Continue expanding your knowledge on the subject by exploring this meticulously chosen external site. https://www.tangent.com/solutions/security-compliance/dmarc, discover new perspectives and additional information to enhance your knowledge of the subject.

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