DMARC stands for Domain-based Message Authentication, Reporting & Conformance
DMARC record is a DNS record which helps senders and receivers to determine whether or not a message is sent from the sender legitimately. DMARC is the best way to protect your customers, your brand, and your employees from phishing and spoofing attacks.
Benefits of having DMARC
- Better control over email spam.
- Reduce phishing.
- Provide authentication reporting.
Please check this document
for detailed information on DMARC.