Messaging compliance
A2P 10DLC
T-Mobile-scoped 10DLC registration guidance.
Read the answerEmailBIMI
BIMI logo signals, DMARC enforcement, and provider scope.
Read the answerEmailCAN-SPAM
US commercial-email scope, requirements, and opt-out timing.
Read the answerSMSCTIA messaging principles
Voluntary CTIA messaging guidance and opt-out expectations.
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 answerSMSExpress written consent
Consent scope and recordkeeping boundaries.
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 answerRCSRCS agent
Learn what an RCS agent represents, why its declared use case matters, and what to prepare for Google's launch review.
Read the answerRCSRCS for Business
Understand Google's RCS for Business platform, consent and launch requirements, and why a successful launch does not mean every phone is reachable.
Read the answerRCSRCS verified sender
Understand RCS brand verification, the sender checkmark in Google Messages, and why verification and recipient permission need separate checks.
Read the answerEmailSender reputation
Provider-scoped sending reputation and spam signals.
Read the answerSMSSMS opt-in
SMS permission scope and records.
Read the answerSMSSMS opt-out
SMS opt-out handling and reasonable revocation methods.
Read the answerSMSSMS quiet hours
Recipient-local-time boundaries in the cited US provision.
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 answerSMSTCPA
TCPA scope and consent boundaries for covered messaging.
Read the answerSMSToll-free verification
Twilio US and Canada toll-free verification scope.
Read the answerWhatsAppWhatsApp 24-hour window
Learn when WhatsApp Business Platform replies need a template, which message resets the service window, and what to check before a delayed reply.
Read the answerWhatsAppWhatsApp message template
Understand approved WhatsApp message templates, when they are needed, and what to review before reusing one for another send.
Read the answerWhatsAppWhatsApp opt-in
Understand WhatsApp opt-in, review how permission is collected, and check how requests to stop messages reach your sending process.
Read the answerEmailYahoo sender requirements
Yahoo authentication, unsubscribe, and spam guidance.
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