No one will shed a single tear for you, greedy bastards.

dot one

Website changed, but it is still out there.

Edit: syntax

After the feature of being able to send EPUB files to Kindle through email and them being automatically converted… I have not felt I was missing anything by using standard Kindle software.

So I’d suggest, unless you really really need some obscure feature, Calibre+Kindle is nowadays perfectly fine, and maybe you shouldn’t risk bricking your device.