SPF, DKIM, and DMARC
Three email authentication standards that prevent spoofing and phishing. SPF (Sender Policy Framework) specifies which servers can send email for a domain via DNS TXT records. DKIM (DomainKeys Identified Mail) adds a cryptographic signature to verify message integrity. DMARC (Domain-based Message Authentication) ties SPF and DKIM together with reporting and policy enforcement. Failures can result in SMTP rejections.
Related Protocols
Mentioned in Guides
Related Scenarios
Defined In
Decision Guides
See Also
DNS Record Types
DNS
SMTP Relay
Email & SMTP
Bounce Rate (Email)
Email & SMTP
Email Deliverability
Email & SMTP
Greylisting
Email & SMTP
Backscatter
Email & SMTP
Envelope vs Header
Email & SMTP
ARC (Authenticated Received Chain)
Email & SMTP
BIMI (Brand Indicators for Message Identification)
Email & SMTP