just a warning for everyone that has a lot of users. This plugin has the same issue as the build-in tool by oxwall/skadate: If you send a Newsletter to a lot of people it will crash your website and only send out a few newsletters. 

You will get a time-out error. 

The problem the plugin is using the cronjob to send mass emails. As soon as there are many emails to send, it will crash.

I reached out to the developer of this pluing about this issue but have not heard back yet. 

I cannot delete or update my review for this plugin so keep this in mind before purchasing!