What is DMARC?

DMARC provides a way for email receivers to check that emails are legitimate and have not been tampered with in transit. The protocol allows email receivers to verify that the email was actually sent by the domain it claims to be from and that it has not been altered.

DMARC set-up is managed by an email server administrator who decides what to do with a suspicious email. DMARC can either monitor email traffic, quarantine emails by sending them to the spam folder, or reject them by preventing unauthorized emails to get delivered at all. Usually, DMARC automatically drops and deletes messages, after security has been rigorously tested.

DMARC is important because it helps to reduce the number of spoofed and fraudulent emails that reach customers' inboxes. Spoofed emails are often used to spread malware, steal data, or defraud recipients. DMARC can help businesses protect their customers from these threats, which in turn helps to protect their reputation.