I've been getting this message on my Blogger dashboards. I don't really know what Feedburner does - I wasn't aware I was using it. I'm not sure I even really know what a "feed" is. (I asked Google but gave up trying to understand the full answer.)
I do get that the message above involves the "Follow by Email" widget in my sidebar, though, and that this is going to stop working in July.
Whether anyone ever actually used this widget to follow my blog, I have no idea.
So I clicked Learn how (in the message above), which took me to another message:I don't know what a CSV is. Nor where I was meant to click Analyze. I tried FeedBurner Help (in a corner of that "how to" page). I found one Analyze there under Feed Services. But no Subscribers, Email Subscriptions, Subscriber List, Details, Export, or CSV.
Maybe no one ever used that widget to follow my blog by email. I have no idea, and I'm not going to spend any more time on trying to figure it out. This is just to inform anyone who might have been fed such emails, that they will soon stop coming... (Hopefully, that's the only change involved.)