Google Apps migration API mail delivery method is an extension for the Mail gem. It provides a delivery method based on the the Google Apps migration API. This API is only available for organization who uses Google Apps for Business, Education or ISPs. (unfortunately not for Gmail or the free edition) Whenever your application needs to automatically generate complex emails, which have to be manually approved before they can get sent out; You can make life easy with this gem in combination with google apps. Instead of delivering the email the email will be stored in a, preconfigured users DRAFTS folder. You could also integrate this gem with a CRM system in order to load templates for further manual completion.