If you are using the popular Feedburner service to manage your site’s feed(s) you may have wondered how to (a) back up your email subscribers or (b) export them in order to transfer to another service such as MailChimp or Feedblitz.
Here’s a great little tutorial on how to export your Feedburner subscribers in a CSV file:
https://imacify.com/2012/01/how-to-export-feedburner-email-subscribers-in-csv-file/