# Do DMARC checks

DMARC (Domain-based Message Authentication, Reporting and Conformance) is a method that helps prevent spoofing. Spoofing is the abuse of your domain in such a way that emails appear to originate from it. DMARC validates whether an email is legitimate.

For more information, refer to these articles:

- [Use DMARC to validate email from Microsoft](https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/email-authentication-dmarc-configure?view=o365-worldwide)
- [DMARC: What is it and why do you need it?](https://postmarkapp.com/guides/dmarc)

**Procedure**

1. Open the [MX Toolbox tool](https://mxtoolbox.com/Public/Tools/EmailHeaders.aspx).
2. Paste the full email, including the headers and the body.
3. Click **Analyze Header**.
4. Review the results.

Updated on 2025-09-15