CAN-SPAM

The U.S. commercial-email law: truthful headers and subjects, a physical postal address, and a working unsubscribe honored within 10 days.

Free · no signup · last reviewed August 29, 2026

The definition

The U.S. commercial-email law: truthful headers and subjects, a physical postal address, and a working unsubscribe honored within 10 days.

Why it matters to an owner

The floor, not the ceiling. Gmail's 2024 bulk-sender rules (one-click unsubscribe, authentication, complaint thresholds) bind harder in practice than the statute.

This is the work. Want it done?

Everything here is free to use yourself. That’s the point. If you’d rather a senior marketer just handle it, in your accounts and your name: 20-minute call, no pitch deck.

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