Establishing signal
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The Gmail/Yahoo/Outlook requirements, translated into the exact steps for your sending platform.
Dedicated sending domain in Klaviyo, Shopify Email authentication, and one DMARC record covering both.
Domain verification, the SES-backed SPF records, DKIM selector, and what to add yourself.
Domain authentication CNAMEs, s1/s2 DKIM selectors, link branding, and DMARC.
DKIM record, custom Return-Path for SPF alignment, and DMARC for transactional senders.
Not on this list? Run the free sender readiness tools against any domain.