Hello,

Your request is a bit unclear, what black list are you trying to avoid and what type of information are you trying to send? It sounds like you will need to configure a method to send electronic invoices to your customers.

If you can provide more information on what you looking to do we might be able to provide more accurate suggestions. It's important to understand when asking for help to be as detailed as possible with the issue, concern, errors, etc.

This provides the information those that want to help need to support you.