Message says that the doc has been sent to Kindle, but nothing appears on Kindle when I sinc

Push to Kindle seems to be working fine, but when I sinc my Kindle the documents don’t appear

The most common reason for this is that either the Kindle address is incorrect, or the ‘send from’ address isn’t listed in your Amazon approved list. Can you please try the troubleshooting steps here and let us know if that improves things for you?