We don't get involved with your application logic for when to send emails. We just make it very easy to send and track them programmatically. Edit: For examp

We don't get involved with your application logic for when to send emails. We just make it very easy to send and track them programmatically. Edit: For example: you can create and destroy mailing lists programmatically, send emails without worrying about MIME, set a specific delivery time for your emails based on when users are most likely to click on them, access analytics through API, etc.