Home/Fix/DKIM ProblemsDKIM ProblemsFix missing signatures, selector mismatches, and body hash failures.Reading time: 8 minDifficulty: IntermediateEstimated duration: 8 minPrerequisites: DKIMLast updated: 2026-07-17Author: EmpirePrerequisitesDKIMDomainKeys Identified Mail — cryptographic signatures for message integrity.▼Related learningDKIMDomainKeys Identified Mail — cryptographic signatures for message integrity.▼Related problemsBroken DKIM key rotationKey rotation leaves selectors unpublished or mismatched.DKIM body hash mismatchBody modifications invalidate the DKIM body hash.DKIM key too shortDKIM key length is below accepted operational guidance.DKIM passes but DMARC failsDKIM validates but signing domain does not align for DMARC.DKIM public key invalidPublished DKIM key material cannot be used for verification.DKIM selector not foundThe selector DNS record cannot be located.DKIM signature missingMessages leave without a verifiable DKIM signature.DKIM signing-domain mismatchUnexpected d= domain relative to the visible From domain.DKIM verification failureReceivers cannot validate the DKIM signature.▼Recommended toolsMail-TesterSend-a-message spam and authentication scoring for pre-send QA.DKIMCoreDKIM key and signature oriented validation utilities.WorkflowsOpen step-by-step: Configure DKIMEnable DKIM signing and publish selectors.Open step-by-step: Migrate authentication recordsMove SPF, DKIM, and DMARC to a new platform without dual-record failures.Continue LearningDMARC ProblemsResolve alignment failures, policy enforcement blocks, and report gaps.PreviousSPF ProblemsNextDMARC Problems