DMARC stands for Domain-based Message Authentication, Reporting, and Conformance.
It's a DNS record (of TXT type) that helps protect email domains from phishing and spoofing attacks. DMARC records enhance email security by enabling domain owners to specify email authentication policies and receive reports on email traffic using their domain, ultimately reducing the risk of email-based fraud and improving overall email trustworthiness.
It's only two steps to create a DMARC record:
Once you have it, access your domain's DNS zone and create a new TXT record using the generated values and following this format:
paste the value generated by the tool
After adding the new record to your domain's DNS zone, give it some time to propagate worldwide.