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DMARC
Security
A policy that tells mail servers how to handle emails pretending to be your domain.
Definition
DMARC tells receivers what to do if SPF/DKIM checks fail for mail claiming to be from your domain.
In plain English
A policy that tells mail servers how to handle emails pretending to be your domain.
Why this matters
Why it matters: It reduces phishing emails that spoof your organization.
Example
Example: Set DMARC to quarantine or reject messages that fail checks.