Guide
Unsubscribe rules for cold email: the law, Gmail and the standards
Three different bodies set unsubscribe rules: lawmakers, the mailbox providers and the standards authors. These guides keep them apart.
People mix up three things: what the law requires (an opt-out, honoured in time), what Gmail and Yahoo require from bulk senders (one-click unsubscribe), and what the email standards define (the List-Unsubscribe headers). Each guide here quotes the body that makes the rule.
In this section
- RFC 8058 explainedWhat RFC 8058 one-click unsubscribe requires: the two headers, the HTTPS POST, DKIM, why it exists, and who now demands it (Gmail, Yahoo).
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