Mailbox managers use DMARC (Domain-based Message Authentication, Reporting, and Conformance) to detect phishing attempts by implementing DMARC policies that specify the actions to be taken if an email fails authentication.
When an email arrives at the mailbox manager’s domain, the DMARC record for that domain checks various authentication protocols such as Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) to verify that the email originated from an authorized source.
If the email fails authentication, the DMARC policy can instruct the mailbox manager to quarantine or reject the email, preventing it from reaching users’ inboxes.
This way, DMARC helps to detect and prevent phishing attempts by ensuring that only legitimate emails are accepted and delivered. Additionally, DMARC also provides feedback reports that enable mailbox managers to identify and prevent future phishing attempts.
