# The list is write-only

> POST /suppression is the only customer-callable endpoint on this resource. Adding an address works with your API key and in the dashboard at Settings > Do not…

Source: https://warmerly.com/docs/suppression/the-list-is-write-only

**`POST /suppression` is the only customer-callable endpoint on this resource.** Adding an address works with your API key and in the dashboard at **Settings > Do not contact**. Listing, exporting and removing are staff-only and return `404 not_found` for a customer key, including an Agency one.

That split is deliberate. The list aggregates bounce evidence across every tenant, so enumerating or exporting it would expose which addresses other customers have been mailing. Adding stays open because it has to: someone who says "stop emailing me" on a call must be suppressible immediately, not after a support ticket.

If you need an address taken **off** the list, [contact support](https://warmerly.com/contact) since removal means campaigns may mail that person again, so it stays with operators and stays audit-logged.

`404` here means "not available to you", not "no suppression list exists". It is deliberately indistinguishable from a missing route.

## More from Suppression

- [How suppression works with campaigns](https://warmerly.com/docs/suppression/how-suppression-works-with-campaigns): Suppression is workspace-wide, not per campaign or per project. An opt-out holds across every campaign and…
- [Add addresses](https://warmerly.com/docs/suppression/add-addresses): Requires X-Api-Key. Not project-scoped. The list applies to a whole workspace, not a single project. The…
- [Other ways to add addresses](https://warmerly.com/docs/suppression/other-ways-to-add-addresses): Other ways to add addresses in the Warmerly Suppression API reference.