Unsubscribes and the suppression list

Every campaign you send includes an unsubscribe link in the auto-injected footer — there's no toggle to remove it, by design. Without one, Gmail will tank your sender reputation and many jurisdictions consider the email non-compliant.

Two ways recipients can unsubscribe:

1. The footer link — every campaign footer has "Unsubscribe" linked to a unique signed URL. Clicking it opens a public confirmation page (no login required), records the suppression, and shows "Unsubscribed" with the recipient's email.

2. Gmail's native "Unsubscribe" button — we add the List-Unsubscribe and List-Unsubscribe-Post headers (RFC 8058) to every campaign send. Gmail / Apple Mail show their own native unsubscribe button next to the sender name; clicking it POSTs to our endpoint and records the suppression silently.

Where suppressions live:
Each unsubscribe writes to your org's suppression list (Builder → Emails → Distribution Lists tab → Suppression list count). Before any future send, the recipient resolution step removes everyone on the suppression list. So the same person can't be re-emailed even if they're tagged again.

The suppression token is HMAC-signed with a 60-day expiry — the same campaign clicked 6 months later won't process. Recipients can re-subscribe by replying to the original sender; an org admin can re-add them via Contacts.

CAN-SPAM compliance:
The auto-injected footer includes your org name, your physical mailing address (pulled from the org profile), and the unsubscribe link. Make sure your org address is set in Settings → Org Profile, otherwise it shows a placeholder.