FeedBurner is turning down most non-core feed management features that help you optimize and publicize your feed, e.g. email subscriptions, Browser Friendly, and Password Protector.
Feedburner feeds will continue to serve but the automated emails to your subscribers won’t be supported. If you’d like to continue using email subscriptions, we recommend downloading email subscriber data so that you can migrate your subscribers to a new email subscription service (like Feedblitz).
Download Email Subscribers Data
You can easily export a list of your email subscribers by following the steps given below:
1. Click Analyze, and select Subscribers.
2. Click FeedBurner Email Subscriptions, then click Manage Your Email Subscriber List.
This opens a new page.
3. Under View Subscriber Details, click CSV (next to “Export”).