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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.

DG
Daniel Groves
Head of Security Research · ComplianceLayer
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Part 1 of 2DMARC for MSPs
Next →DMARC Check API: How MSPs Query Email Auth Records Programmatically
DG
Daniel Groves
Head of Security Research · ComplianceLayer
ComplianceLayer research team 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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