At first, I had set up my account to go to
email@kindle.com and set my limit on Manage your Kindle to $0.00. Everytime I sent something via Calibre, I kept getting messages from Amazon saying I had exceeded my spending limit and they sent the document through my
email@free.kindle.com account. Went back into Calibre and changed the email address to
email@free.kindle.com - no more emails.