A quick reference for the terms you will see across DMARCER.
- SPF - lists who may send email for your domain.
- DKIM - a signature proving a message was not tampered with.
- DMARC - ties SPF and DKIM together and sets what to do with failures.
- MTA-STS - requires encrypted email delivery.
- TLS-RPT - reports on encrypted-delivery problems.
- DNSSEC - protects your DNS records from tampering.
- RUA - aggregate DMARC reports (summaries).
- RUF - forensic DMARC reports (individual failures).
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