Domain-based Message Authentication, Reporting & Conformance (DMARC) is an email authentication protocol designed to give email domain owners the ability to protect their domain from unauthorized use, such as email spoofing. It works in conjunction with SPF and DKIM to provide a mechanism for receiving email servers to determine if incoming messages align with the policies set by the domain owner and to report back on their findings.
Domain-based Message Authentication is a set of standards used to ensure the authenticity and integrity of email messages by verifying the sender's domain through DNS records. It helps prevent email spoofing and phishing by allowing domain owners to publish policies on how to handle unauthorized emails.
Message Transfer Agent (MTA) security involves protecting the email infrastructure responsible for routing and delivering messages between servers, ensuring confidentiality, integrity, and availability. Effective MTA security requires implementing authentication mechanisms, encryption protocols, and anti-spam measures to safeguard against unauthorized access and malicious attacks.