When you use the firstname.lastname@example.org email address (instead of the email@example.com address), Amazon delivers the title directly to your Kindle device, and also sends the file to your regular email address in case you need to manually load it to your device.
To manually load the file, you’ll receive an email that says “Your Amazon Kindle document is here” which contains a link (it will be the “title name”.azw). Click that link to download the file and then transfer it to your Kindle manually using a USB cable.
A note about the Amazon fee: If you use the regular firstname.lastname@example.org email address, Amazon may charge a small fee to deliver the galley to your Kindle device directly. This fee is entirely on Amazon’s end and is based on the file size, your country, and where you’re accessing 3G. If you are using Wi-Fi on your Kindle device, there is no delivery fee.