Common Mistakes to Avoid When Deploying DMARC

Mistakes to Avoid When Deploying DMARC

Email security is a top priority for organizations today, and DMARC is a powerful tool in the fight against email fraud and phishing attacks. However, deploying DMARC can be complex, and there are common mistakes that organizations should avoid to ensure a successful implementation. 

In this blog, we will explore these mistakes and provide guidance on how to deploy DMARC effectively.

Mistake: Neglecting SPF and DKIM

One of the most common mistakes is deploying DMARC without first implementing SPF and DKIM. SPF and DKIM are essential email authentication methods that DMARC builds upon. Without them, DMARC cannot effectively validate the authenticity of emails, leaving your organization vulnerable to phishing attacks.

  • Solution: Prioritize the implementation of SPF and DKIM before deploying DMARC to establish a strong foundation for email authentication.

Mistake: Not Starting with a “None” Policy

DMARC offers three policy levels: “None,” “Quarantine,” and “Reject.” A mistake many organizations make is starting with a “Quarantine” or “Reject” policy right away. This can lead to legitimate emails being incorrectly flagged or blocked, causing communication issues.

  • Solution: Begin with a “None” policy to monitor email traffic and gain insights into which emails pass or fail DMARC authentication.

Mistake: Skipping Regular Monitoring

DMARC is not a one-time setup; it requires ongoing monitoring and maintenance. Some organizations deploy DMARC and then forget to monitor their email traffic, leaving them unaware of issues that may arise.

  • Solution: Regularly review DMARC reports and adjust policies as needed to maintain the security and reliability of your email communication.

Mistake: Overlooking Subdomains

Another common mistake is focusing solely on the main domain when deploying DMARC and forgetting about subdomains. Cybercriminals often target subdomains to bypass security measures.

  • Solution: Include subdomains in your DMARC deployment to ensure comprehensive email authentication.

Mistake: Misinterpreting DMARC Reports

DMARC generates detailed reports that provide valuable insights into your email traffic. Misinterpreting these reports or failing to analyze them thoroughly is a mistake that can result in missed threats.

  • Solution: Invest time in understanding and interpreting DMARC reports to identify suspicious activities and areas for improvement.

Mistake: Not Communicating with Third Parties

If your organization uses third-party email services, not communicating your DMARC deployment with these providers can lead to email delivery problems.

  • Solution: Coordinate with third-party email service providers to ensure a smooth DMARC implementation that doesn’t disrupt email communication.

Mistake: Rushing the “Reject” Policy

While the ultimate goal of DMARC is to achieve a “Reject” policy, rushing into this phase without proper preparation can lead to email delivery issues, including legitimate emails being blocked.

  • Solution: Gradually progress from “None” to “Quarantine” and, finally, to “Reject” as you gain confidence in your DMARC deployment and understand its impact on your email traffic.


Deploying DMARC is a crucial step in securing your organization’s email communication. By avoiding these common mistakes and following best practices, you can ensure a successful DMARC implementation that enhances email security and protects your organization from phishing attacks. GoDMARC is your one-stop destination for all cybersecurity needs. 

Check out GoDMARC pricing and get the best-customized plans for your organization. 


Q1: How can I ensure alignment with SPF and DKIM when implementing DMARC?

A: Ensure that your SPF and DKIM settings align with your DMARC policy by specifying the same domain in all authentication mechanisms and adjusting your DMARC policy accordingly.

Q2: What role do DMARC reporting tools play in deployment?

A: DMARC reporting tools provide valuable insights into email authentication failures, authorized senders, and sources of spoofed emails. They are essential for fine-tuning your DMARC configuration.

Q3: Can I implement DMARC on my own, or should I seek professional assistance?

A: While some organizations can implement DMARC on their own, seeking professional assistance is advisable, especially for complex configurations. Experts can help avoid common mistakes and ensure a smoother deployment.

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