DKIM
DKIM
Authentication
DMARC
Authentication
Dedicated IP
Reputation
Plain language
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Definition
Definition
Example
Example
Related
Related
Fix
Fix
DKIM
Step by step
selector._domainkey
v=DKIM1; k=rsa; p=…
Examples
Related
Plain-language definitionsEach term has a short definition, an example and related terms.
SPFWhich IPs may send
PASS
DKIMMessage is unaltered
PASS
DMARCWhat to do on fail
PASS
Together they prove identity
Connected
Visual
How terms connectSPF, DKIM and DMARC work as a set. See how each one builds on the last.
Example records
TYPE
NAME
VALUE
TXT
@
v=spf1 include:example.com ~all
CNAME
sel._domainkey
dkim.example.com
TXT
_dmarc
v=DMARC1; p=none
Example values
Real examples
Copyable
See the recordEach authentication term shows the real DNS record it uses.
Message headers
Received: from mx1
Authentication-Results:
spf=pass
dkim=pass
dmarc=pass
Return-Path: <a@b.com>
From: Acme <hi@acme.io>
Subject: Hello
SPF · passSender allowed
DKIM · passSignature valid
DMARC · passAligned
SPF pass
DKIM pass
DMARC pass
In context
Annotated
Find it in headersLearn where each term shows up in a real message.
p=none
p=quarantine
p=reject
DeliveredMonitor and learn
Spam folderSuspicious mail held
BlockedForgeries rejected
Actionable
Staged
Use itTurn the term into a decision: pick a DMARC policy.
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Triple
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Headers
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