DMARCSPFDKIM

DMARC, SPF, and DKIM are email authentication methods used to verify the legitimacy of emails and protect against email spoofing and phishing attacks. They work together to ensure that emails sent from a domain are indeed authorized by the domain owner.

SPF (Sender Policy Framework) is an email authentication method that allows domain owners to specify which mail servers are permitted to send emails on behalf of their domain. It involves adding a TXT record to the domain's DNS settings that lists the authorized mail servers. When an email is sent, the receiving server checks the SPF record to verify that the email is coming from an authorized server.

DKIM (DomainKeys Identified Mail) is another email authentication method that uses digital signatures to verify the authenticity of an email. It involves generating a public and private key pair, adding the public key to the domain's DNS settings, and signing outgoing emails with the private key. The receiving server then uses the public key to verify the signature and ensure that the email has not been tampered with.

DMARC (Domain-based Message Authentication, Reporting, and Conformance) builds upon SPF and DKIM by providing a framework for domain owners to specify how their emails should be handled if they fail authentication checks. It involves adding a DMARC record to the domain's DNS settings that specifies the policy for handling emails that fail SPF or DKIM checks. The policy can be set to none, quarantine, or reject, allowing domain owners to control how their emails are treated by receiving servers.

Together, SPF, DKIM, and DMARC form a comprehensive email authentication system that helps protect against email spoofing and phishing attacks. By implementing these methods, domain owners can ensure that their emails are authenticated and trusted by receiving servers, reducing the risk of their emails being marked as spam or rejected.