You don't have to verify the upload if you whitelist your email address. Then it just goes straight through. Also, the epub conversion worked for years before

You don't have to verify the upload if you whitelist your email address. Then it just goes straight through. Also, the epub conversion worked for years before Amazon officially supported it! You just had to rename the .epub to .png and then it would convert it. Very weird, they probably had some kind of block on .epub .