// COMPLIANCE

One-click unsubscribe (RFC 8058)

One-click unsubscribe is an email header (List-Unsubscribe-Post) that lets recipients unsubscribe with a single click, required by Google/Yahoo for bulk senders.

// IN PRACTICE

Modern sequencers add this header automatically. Without it, bulk sending now lands in spam.

// RELATED TERMS

Bulk sender requirements (Google/Yahoo 2024)CAN-SPAM

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// MORE

SPF DKIM DMARC MX record DNS propagation TXT record CNAME Warmup Pre-warmed mailbox Inbox placement Deliverability Sender reputation

// READY

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