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.

Contact