Comparison Guide

DKIM vs DMARC

DKIM signs email with a cryptographic key. DMARC evaluates alignment and tells receivers how to handle failures.

DKIM

DKIM helps confirm that certain parts of a message were signed with a domain-associated key and were not altered after signing.

DMARC builds policy and reporting on top of SPF and DKIM alignment outcomes.

DKIM is one authentication signal. DMARC is the policy layer that helps receivers decide what to do when messages do or do not align properly.

DKIM Checker Validate selector-based DKIM records and lookup formatting. DMARC Checker Review policy, alignment, and reporting tags. TXT Lookup Inspect the underlying TXT records used for these controls. DNS Lookup Check supporting DNS context and nameserver behavior.

SPF vs DKIM vs DMARC Compare DKIM and DMARC inside the broader authentication model. SPF vs DMARC Contrast sender authorization with policy and alignment. MX Record vs SPF Record Separate delivery routing from sender authorization.

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