Bulk Email Nulled Add-on gives Admin the ability to send emails in bulk to all the registered users or Based on User Roles. The Email can be sent right away, or you can schedule to send it later. It can also be saved as a draft for later use and can be edited before sending. Once sent, the message goes into the Sent Items tab, with the columns displaying Form Name, Subject, and Sent Date.
Demo : https://pieregister.com/addons/bulk-email-addon/