This addon is provided AS IS with no support or warrenties provided.
This addon was thrown together for a customer but never used.
In short, each month it will take the newest 3 items from "Whats New", put them into an email and email them to your members.
To install, upload the contents of the upload folder to your XenForo directory, then import the addon-monthlyEmail.xml from your admin CP.
To alter the email templates, enable the development tab of your XenForo install and then edit the relevent template.