DMARC Check: How to Verify Your Email Authentication and Prevent Fraud.


DMARC, which stands for Domain-based Message Authentication, Reporting, and Conformance, is an email authentication protocol that helps protect email domains from fraudulent activities such as email phishing and spamming. DMARC works by providing a way for email receivers to check that incoming emails are actually sent from the claimed sender and that the message has not been tampered with during transmission.

DMARC is an essential part of email authentication and helps ensure that legitimate emails are delivered while fraudulent messages are rejected or sent to the spam folder. With DMARC, organizations can improve their email deliverability rates and protect their brand reputation.

One key aspect of DMARC is the DMARC check, which is the process of verifying that an email domain is properly configured with DMARC. DMARC checks play a crucial role in helping organizations prevent email fraud and ensuring that their emails are delivered successfully.

What is DMARC Checker?

A DMARC check is a process of verifying that an email domain is configured with DMARC and that the DMARC record is properly set up. DMARC checks involve various tests that examine the authentication protocols used by the email domain and assess the domain’s compliance with the DMARC standards.

The importance of performing a DMARC check cannot be overstated. DMARC checks help ensure that emails sent from a domain are delivered successfully, as they verify that the email message is not fraudulent or spoofed. DMARC checks also help organizations maintain their brand reputation by ensuring that their emails are not caught in spam filters or rejected outright.

There are different types of DMARC checks that organizations can perform, including policy checks, syntax checks, and alignment checks. Policy checks verify that the DMARC policy for a domain is properly defined and set up. Syntax checks ensure that the DMARC record is correctly formatted and follows the DMARC specification. Alignment checks examine whether the header from, domain name, and authenticated domain align with each other.

Validating a DMARC Record

A valid DMARC record is a properly configured DMARC policy that meets the DMARC specification. A valid DMARC record should include the following components:

  1. A valid DMARC policy statement that defines how email receivers should handle messages that fail DMARC checks.
  2. Proper alignment between the domain name used in the “From” field of an email message and the domain used in the DKIM signature.
  3. Proper alignment between the domain name used in the “From” field of an email message and the domain used in the SPF record.
  4. A valid DKIM signature that confirms the email’s authenticity.
  5. A valid SPF record that confirms the email’s authenticity.

It’s important to have a valid DMARC record to ensure that emails sent from your domain are delivered successfully and that your domain is protected from fraudulent activities. You can check if your DMARC record is valid by using a DMARC checker tool or by examining the DMARC record manually. If there are issues with your DMARC record, take steps to correct them to ensure the proper functioning of your email system.

How to Perform a DMARC Check and SPF Records?

DMARC works in conjunction with SPF (Sender Policy Framework), which is another email authentication protocol that checks whether the email sender is authorized to send emails from a particular domain. Here’s a step-by-step guide on how to check your DMARC and SPF records:

  1. Determine the domain name you want to check. This is typically the domain name that follows the “@” symbol in an email address.
  2. Use an online tool to check your domain’s DMARC and SPF records. There are several tools available online, including DMARC checker free and SPF checkers.
  3. Enter the domain name into the tool and run the check. The tool will analyze your domain’s DMARC and SPF records and provide a report with the results.
  4. Review the report and identify any issues or errors. If there are issues with your DMARC or SPF records, take steps to correct them to ensure the proper functioning of your email system.
  5. Take action based on the DMARC check results. If the DMARC check reveals issues with the domain’s DMARC record, take steps to correct them. This may involve updating the DMARC record, correcting alignment issues, or addressing other issues that are identified in the report.
DMARC Checker Result
DMARC Checker Result

Understand DMARC Checker Results

SPF Record Details for DMARC

Results of SPF Checker/SPF Lookup:

Some tips for interpreting the results of a DMARC check include understanding the different types of DMARC policies, knowing the different authentication protocols used in DMARC, and understanding the meaning of different DMARC error codes.

Common errors and issues that may be identified in a DMARC check include missing or incorrect DMARC records, incorrect SPF and DKIM configurations, and alignment issues between the email header and the authenticated domain.

DMARC Case Studies and Example:

DMARC has been implemented successfully by many different types of organizations, from small businesses to large enterprises. Here are some examples of DMARC implementation for different types of domains and organizations:

  1. Non-profit organization: A non-profit organization successfully implemented DMARC to reduce phishing attacks and protect its donors’ sensitive information.
  2. E-commerce website: An e-commerce website implemented DMARC to protect its customers from fraudulent emails and improve the overall security of its email system.
  3. Financial institution: A financial institution implemented DMARC to reduce the risk of email fraud and ensure that its customers’ sensitive financial information is protected.

There are also many case studies available that highlight the impact of DMARC on email authentication and fraud prevention. These case studies can provide valuable insights into the benefits of DMARC and how it can improve the security of your email system.


DMARC is an essential email authentication protocol that can help protect your organization from email fraud and phishing attacks. By performing regular DMARC checks, validating your DMARC records, and using DMARC checkers and generators, you can ensure that your email system is properly authenticated and secure. Implementing DMARC can also help build trust with your customers and improve the overall reputation of your organization.

Subscribe to Phisher Safe by SimpleDMARC

Don’t miss out on the latest issues. Sign up now to get access to the library of members-only issues.