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Email Authentication Fundamentals
DNS: The Single Source of Truth
Specific DNS Providers (11)
Checking consistency of DNS Servers
Deliverability Advice Questions
DMARC/DKIM NS Records: Why You Shouldn't Be Concerned
Email authentication for multiple DNS views
Legal Characters in DNS
See all 10 articles
DMARC: The Gatekeeper
What is DMARC?
DMARC Aggregate Reports
DKIM and SPF alignment: what it is, why it matters and how to fix it
When to switch Enforcement policies
See all 9 articles
SPF: Who Sent It?
What is SPF?
Valimail SPF Records
Working around Vendor Verification of SPF
Trailing SPF Includes in Valimail Delegated Domains
See all 6 articles
DKIM: Who Signed It?
What is DKIM?
How does DKIM work?
What characters are permitted in a DKIM selector?
Rotating DKIM keys
ARC: Who Forwarded It?
What is ARC?