In the context of Mimecast, what does DMARC stand for?

DMARC stands for Domain-based Message Authentication Reporting and Conformance. This is a critical protocol that helps email senders and recipients work together to combat email spoofing and phishing attacks. By generating reports and providing a mechanism for email senders to specify which authentication methods are employed (like SPF and DKIM), DMARC enables domain owners to protect their email domains from unauthorized use.

When a domain owner implements DMARC, they can instruct recipients on how to handle emails that fail authentication checks, thereby improving the overall security and integrity of email communication. The feedback mechanism allows senders to gauge whether their emails are being delivered securely and informs them about potential unauthorized use of their domain, making it a vital tool in the realm of email security.

The other options do not accurately encapsulate the specific functions or terminology associated with DMARC, which focuses specifically on domain-based authentication and the reporting objectives tied to that authentication.