DMARC (Domain-based Message Authentication, Reporting, and Conformance) is crucial for protecting your domain from email spoofing and phishing attacks. Without DMARC, malicious actors can impersonate your domain to send fraudulent emails, damaging your brand reputation and trustworthiness. DMARC relies heavily on SPF authentication and DKIM for proper functionality.
DMARC performs authentication checks on incoming messages to verify their legitimacy. When emails fail authentication checks or fail DMARC validation, they are handled according to your domain's policy—such as being rejected or quarantined—ensuring that unauthorized or malicious emails do not reach your users. Running a DMARC check is essential to identify and correct errors in your DNS records, which helps prevent delivery issues and strengthens your email security. Additionally, it is important to analyze DMARC reports regularly to assess your email infrastructure and further improve your security posture.
By implementing DMARC, you ensure that only authorized senders can use your domain, while unauthorized emails are either flagged or rejected. Additionally, DMARC provides visibility into your email authentication status through reports, allowing you to monitor and improve your email security posture.