Export Magento customer emails

Every so often I am asked by clients to export various data out of their shop. Recently a client asked me to export all customer emails from orders so they can execute a Newsletter campaign. As this sounds as something Magento should support out-of-the box as part of its Export functionality that's not the case and you'll need to write your own script or 3rd party extensions to do it. Here is a blog post that I explain in details how to do it and it's quite straight forward:

http://yysource.com/2014/02/export-all-customers-and-emails-from-magento-orders/