DMARC vs SPF
DMARC (Domain-based Message Authentication, Reporting and Conformance) and SPF (Sender Policy Framework) both come up in technology conversations and get confused. Here's the plain-English difference, side by side, so you can use each one with confidence.
The key difference: DMARC refers to domain-based message authentication, reporting and conformance, while SPF refers to sender policy framework — they describe different things even when they show up in the same sentence.
DMARC — Domain-based Message Authentication, Reporting and Conformance
An email policy that builds on SPF and DKIM to tell receiving servers what to do with messages that fail authentication.
SPF — Sender Policy Framework
An email authentication standard that lets a domain owner specify which servers are allowed to send email on its behalf.
When to use DMARC
Reach for "DMARC" when the conversation is specifically about domain-based message authentication, reporting and conformance. An email policy that builds on SPF and DKIM to tell receiving servers what to do with messages that fail authentication.
When to use SPF
Reach for "SPF" when the conversation is specifically about sender policy framework. An email authentication standard that lets a domain owner specify which servers are allowed to send email on its behalf.
FAQs
What is the difference between DMARC and SPF?
DMARC stands for Domain-based Message Authentication, Reporting and Conformance — An email policy that builds on SPF and DKIM to tell receiving servers what to do with messages that fail authentication. SPF stands for Sender Policy Framework — An email authentication standard that lets a domain owner specify which servers are allowed to send email on its behalf.
Are DMARC and SPF the same thing?
No. They're often used in the same conversation because they're related, but they describe different concepts. DMARC = Domain-based Message Authentication, Reporting and Conformance. SPF = Sender Policy Framework.
When should I use DMARC vs SPF?
Use DMARC when you're specifically referring to domain-based message authentication, reporting and conformance. Use SPF when the topic is sender policy framework.