> For the complete documentation index, see [llms.txt](https://experience-crm.gitbook.io/experience-crm-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://experience-crm.gitbook.io/experience-crm-api/mailing-list.md).

# Mailing list

- [When to use CSV Import and Widget Newsletter](https://experience-crm.gitbook.io/experience-crm-api/mailing-list/when-to-use-csv-import-and-widget-newsletter.md): Choosing between the CSV Imports API and the Newsletter Widget API depends on whether the recipient has already provided consent.
- [CSV Imports](https://experience-crm.gitbook.io/experience-crm-api/mailing-list/csv-imports.md): This API allows you to populate a mailing list on the CRM Experience with custom fields.
- [Get all fields](https://experience-crm.gitbook.io/experience-crm-api/mailing-list/csv-imports/get-all-fields.md): Get All fields will return the list of sending list available for you (depending on your Bearer Token) and all fields available on each list.
- [Add a recipient](https://experience-crm.gitbook.io/experience-crm-api/mailing-list/csv-imports/add-a-recipient.md): This method allows you to add a recipient to the mailing list.
- [Delete a recipient](https://experience-crm.gitbook.io/experience-crm-api/mailing-list/csv-imports/delete-a-recipient.md): The DELETE method allows you to delete the data of a customer on the mailing list
- [Widget Newsletter](https://experience-crm.gitbook.io/experience-crm-api/mailing-list/widget-newsletter.md)
- [Unsubscribe / Opt Out](https://experience-crm.gitbook.io/experience-crm-api/mailing-list/unsubscribe-opt-out.md)
- [Get unsubscribed customer](https://experience-crm.gitbook.io/experience-crm-api/mailing-list/unsubscribe-opt-out/get-unsubscribed-customer.md): This method allows you to retrieve all unsubscribed customers since a specific date.
- [Unsubscribe a list of customers](https://experience-crm.gitbook.io/experience-crm-api/mailing-list/unsubscribe-opt-out/unsubscribe-a-list-of-customers.md): This method allows you to unsubscribe one or more customers by specifying the type of unsubscription.