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Per-provider setup guides for SPF, DKIM, and DMARC across common email and marketing platforms.

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Google Workspace SPF Setup: Authorize Every Real Sender
Google documents v=spf1 include:_spf.google.com ~all for a domain whose mail is sent only through Google Workspace. …

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Google Workspace SPF Setup: Authorize Every Real Sender
Google documents v=spf1 include:_spf.google.com ~all for a domain whose mail is sent only through Google Workspace. …
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Related topics

Email Authentication
How SPF, DKIM, and DMARC work together to prove an email really came from your domain.
SPF
Sender Policy Framework: syntax, DNS lookup limits, permerror, and common misconfigurations.
DKIM
DomainKeys Identified Mail: selectors, signing, alignment, and key rotation.
DMARC
DMARC policies, alignment, and aggregate/forensic reporting.
DNS
The DNS record types and concepts email authentication and delivery depend on.
SMTP
SMTP transport, STARTTLS, MTA-STS, and TLS reporting.
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