How To Delete A List With All Its Contacts Author: Mayank Agarwal | Read more posts by this author. A Step-By-Step Guide To Delete A List With All Its Contacts. SendX makes it extremely easy to delete a list of contacts. You can do the job in just a few clicks. Here's how to do it in less than a minute: Click on the Contacts + List Top panel. Go to the list you want to delete, and click on the Action button under the Actions column. Click on Delete. Check the box Delete all associated contacts to delete all contacts within that list. This will remove them from the Contacts CRM as well.