# Suppression List A suppression list is a list of email addresses that should not receive marketing communications. This list typically includes unsubscribed users, bounced emails, or customers who have opted out of receiving further emails. \ \ By maintaining a suppression list, businesses ensure they comply with privacy regulations and avoid sending unwanted emails to recipients. {% embed url="" %} Suppression list {% endembed %} The **Suppression List** option helps ensure a better email delivery rate by automatically managing contacts that may cause issues, such as bounces or spam complaints. \ \ With this feature, contacts that repeatedly trigger delivery problems are automatically added to the suppression list and excluded from receiving future emails. #### Enable Suppression List By enabling the **Suppression List**, Retainful will automatically add contacts to the suppression list if they have repeated bounces or spam complaints, ensuring that these contacts do not receive any more emails. #### Suppress Contacts Based on the Bounce Threshold You can set a threshold for the number of bounces after which a contact will be added to the suppression list. For example: > You can set a threshold for the number of bounces after which a contact will be added to the suppression list.\ > \ > **EXAMPLE 1**
> > * **Suppress contacts if emails bounce at least**: > * Set the threshold to a specific number of bounce events (e.g., 2 or 3). > > \ > **EXAMPLE 2**
> > * If you set the bounce threshold to **3** and an email fails to be delivered three times, the customer will automatically be added to the suppression list and will no longer receive emails from you. **How it Works** * Retainful will track each email sent to a contact and monitor delivery attempts. * If an email bounces or results in a spam complaint more than the set threshold, the contact will be added to the suppression list. * Once added, these contacts will not receive future marketing or transactional emails, helping to improve your email deliverability rates. {% hint style="success" %} **Need More Help?** We’re here to make things easier for you! * Email Us: Reach out anytime at . * Schedule a Call: Still stuck or need a hands-on walkthrough? Book a quick session with our support team, and we’ll guide you step-by-step. [**Schedule a call with us**](https://zcal.co/retainful/onboarding)**.** {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.retainful.com/settings/retainful-settings/suppression-list.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.