> ## Documentation Index
> Fetch the complete documentation index at: https://docs.userpilot.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Suppression list

> The Suppression List helps you maintain email deliverability, protect your sender reputation, and ensure compliance with regulations such as CAN-SPAM and GDPR.

## Overview

The Suppression List helps you maintain email deliverability, protect your sender reputation, and ensure compliance with regulations such as **CAN-SPAM** and **GDPR**. It automatically tracks and manages email addresses that should no longer receive emails from you for some reason.

## Get started

Click on [Configure > Settings > Email >](https://run.userpilot.io/settings/email-settings/email-suppression-lists) where you'll find your **Suppression** list.

Then you will see key details for each suppressed email:

* **Email:** the address that was suppressed.
* **Date:** when the address was marked for suppression.
* **Suppression Reason:** why it was added to the list.

<Info>
  Userpilot automatically maintains a **suppression** list and prevents sending emails to addresses flagged for various reasons.
</Info>

<Note>
  * If you try sending an email to an address on the suppression list, Userpilot will automatically block it to ensure compliance.
  * You can’t manually add or edit email addresses. However, you can unsuppress addresses if needed.
</Note>

<img src="https://mintcdn.com/userpilot/4bTZyxkEsWzJ39h7/images/756.png?fit=max&auto=format&n=4bTZyxkEsWzJ39h7&q=85&s=669f893cb8aa83c703f5059c5d835626" alt="756.png" width="5760" height="4096" data-path="images/756.png" />

## Suppression reasons

Userpilot’s suppression list covers multiple reasons an email might be blocked from future sends:

**1.User Opt-Out**

Users who clicked “unsubscribe from all emails” will automatically be added to the suppression list to respect their marketing preferences.

**2. Hard Bounce (Invalid Email Addresses)**

These are addresses that can’t be delivered due to permanent errors:

* **Incorrect Email Addresses:** Typographical or formatting errors.
* **Non-Existent Domains:** Domains that don’t exist or are unreachable.
* **Repeated Mailbox Full:** Addresses that consistently bounce due to a full inbox.

**3. Spam Complaints**

Users who marked your emails as spam will be suppressed automatically, protecting your sender reputation and avoiding potential blacklisting.

**4. Temporary Soft Bounce**

Addresses that failed to deliver multiple times because of server issues will be added to the suppression list to reduce repeated failures.

**5. Role-Based Emails**

Group or shared addresses (for example, [**support@company.com**](mailto:support@company.com)) that are flagged for issues may also fall under suppression, ensuring better targeting and deliverability.

## Why this matters

Maintaining a suppression list is essential for:

* Compliance with regulations (e.g., CAN-SPAM, GDPR).
* Protecting your sender reputation.
* Improving email deliverability.
* Respecting your users’ preferences.

Userpilot’s suppression list management is designed to be automatic and transparent, so you can focus on creating meaningful user journeys without worrying about deliverability risks.