Feedburner Drops Email Subscription Service
https://developers.google.comStarting in July, Google will be migrating FeedBurner onto a more stable, modern infrastructure. With this, they plan to drop non-core feed management features like email subscriptions.
For those who use FeedBurner to manage email subscriptions, we recommend downloading your email subscribers so that you can migrate to a new email subscription service. This data will also still be available for download after July.