Setup checklist#
- ☐ Include a visible unsubscribe link in every marketing message.
- ☐ Add List-Unsubscribe and List-Unsubscribe-Post headers so providers show a native unsubscribe button.
- ☐ Process opt-outs immediately; the legal maximum is 10 business days in the US, but providers expect 2 days.
- ☐ Never require login or more than one click to unsubscribe.
Audit checklist#
- ☐ Confirm you are not: unsubscribe pages that ask 'are you sure' with a hidden confirm button.
- ☐ Confirm you are not: continuing sequences from a different tool after an opt-out in another.
Ongoing monitoring#
- ☐ Weekly: review provider dashboards (Postmaster Tools, SNDS) and bounce logs
- ☐ Monthly: re-run the setup verification after any vendor or DNS change
- ☐ Quarterly: full audit against this checklist
Frequently asked questions#
What is one-click unsubscribe?
An RFC 8058 header pair that lets the mailbox provider send a POST to your endpoint when a user clicks Unsubscribe in the client, with no landing page.