BIMI
BIMI logo signals, DMARC enforcement, and provider scope.
Read the answerEmailCAN-SPAM
US commercial-email scope, requirements, and opt-out timing.
Read the answerEmailDKIM
DKIM signing, cryptographic requirements, and alignment.
Read the answerEmailDMARC
Learn how DMARC works, what email senders need, what p=none permits, and how to roll out an aligned policy safely.
Read the answerEmailDomain reputation
Authenticated-domain reputation in Google reporting.
Read the answerEmailEmail deliverability
Inbox placement and delivery outcomes.
Read the answerEmailGmail bulk sender requirements
Gmail's bulk-sender scope and published authentication requirements.
Read the answerEmailIP reputation
Sending IP reputation and its provider scope.
Read the answerEmailList-Unsubscribe header
List-Unsubscribe headers and one-click boundaries.
Read the answerEmailOne-click unsubscribe
RFC 8058 headers and endpoint requirements.
Read the answerEmailSender reputation
Provider-scoped sending reputation and spam signals.
Read the answerEmailSpam complaint rate
Provider-scoped complaint measurements and thresholds.
Read the answerEmailSPF
What SPF authorizes and what it does not prove.
Read the answerEmailSuppression list
Amazon SES suppression scope and reasons.
Read the answerEmailYahoo sender requirements
Yahoo authentication, unsubscribe, and spam guidance.
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