# Blacklisting Customers This endpoint is used for blacklisting email addresses from receiving Nosto's triggered emails such as cart-abandonment emails, order-follow emails, and we-miss-you emails. Having the corresponding email address in our system prior to blacklisting or unblacklisting is not a prerequisite. If the specified email record does not exist in our system, it will be created. ## Token This endpoint requires an Email token. ## Blacklisting an email You can specify multiple email addresses separated by a newline. ``` curl -v -X POST https://api.nosto.com/v1/email/blacklist?op=add \ --user :WI0j2oN7TgG42tlblX3yzOQ5xvCYc2oYj9eWg79lghVq8R0nKQXlVE9wvihBUFOw -d ' john.doe@nosto.com jane.doe@nosto.com' ``` ## Unblacklisting an email You can specify multiple email addresses separated by a newline. ``` curl -v -X POST https://api.nosto.com/v1/email?op=remove \ --user :WI0j2oN7TgG42tlblX3yzOQ5xvCYc2oYj9eWg79lghVq8R0nKQXlVE9wvihBUFOw -d ' john.doe@nosto.com jane.doe@nosto.com' ``` --- # 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://docs.nosto.com/techdocs/apis/rest/customers/blacklisting-customers-using-the-blacklist-api.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.