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DMARCMar 29, 202612 min

SPF vs DKIM vs DMARC: What MSPs Need to Know

MSPs get asked about SPF, DKIM, and DMARC constantly -- usually the week before a client's insurance renewal. Here's the practical breakdown: what each record does, what it doesn't do, how they work together through DMARC alignment, and how to audit your entire client base before an underwriter does.

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Part 1 of 2DMARC for MSPs
Next →DMARC Check API: How MSPs Query Email Auth Records Programmatically
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ComplianceLayer research analyzing security frameworks, compliance standards, and emerging threats.
TopicsDMARCSPFDKIMEmail SecurityMSPCyber InsuranceEmail Authentication
On this page
  • Why All Three Records Exist
  • SPF vs DKIM vs DMARC: Side-by-Side Comparison
  • SPF: The Authorized Sender List
  • DKIM: The Cryptographic Signature
  • DMARC: The Enforcement Policy
  • How SPF, DKIM, and DMARC Work Together
  • The Real-World Failure Patterns MSPs See
  • Auditing Your Client Base
  • The Target State for Every Client Domain
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