# Stop mailing the addresses that hurt you.

Every bounce, complaint, and unsubscribe automatically adds the recipient to your suppression list, so you don't mail them again. Suppression is reversible, queryable through the API, and applies across transactional and marketing sends.

## The single biggest lever on your reputation.

Suppression is built into the Bird Email API, not a list you maintain by hand. Mailbox providers punish senders who keep hitting dead addresses and spam-trap complaints; Bird stops those sends for you, automatically, the moment a recipient goes bad.

## Five ways suppression protects you.

Automatic, reversible, and queryable.

## Automatic by default, yours to control.

You never have to touch the list for it to work; bounces and complaints suppress on their own. But when you need to, the whole list is an API: add an address you already know is bad, look one up, or reinstate a recipient that recovered.

## Go deeper in the docs.

Read how automatic and manual suppression work in the suppressions guide, and how it fits the bigger picture in the deliverability guide.

## About 40% of the world's commercial email already runs on Bird.

Transactional and marketing email on infrastructure we've run for a decade. Suppression is one capability of the Bird Email API: sending, deliverability, dedicated IPs, and analytics ship with it.