# Suppressions

> Manage the suppression list that blocks emails to specific addresses.

Source: https://sndr.sh/docs/cranl/suppressions

SNDR does not send to suppressed addresses. Addresses are added automatically on hard bounces and one-click unsubscribes. You can also add them yourself (e.g. opt-outs collected elsewhere) or remove one that was added in error.

> **Warning:** Removing a suppression for an address that hard-bounced or complained may harm your sender reputation. Only remove suppressions you are confident are safe.

- [List suppressions](https://sndr.sh/docs/cranl/suppressions/list-suppressions) `GET /api/cranl/v1/suppressions`: List every suppressed address on the connected account, newest first.
- [Add suppression](https://sndr.sh/docs/cranl/suppressions/add-suppression) `POST /api/cranl/v1/suppressions`: Suppress an address, e.g.
- [Remove suppression](https://sndr.sh/docs/cranl/suppressions/remove-suppression) `DELETE /api/cranl/v1/suppressions/{addr}`: Remove an address so emails to it are attempted again.