title_body: Removing identifiable metadata from azw3 Amazon's "Send to Kindle by E-mail" service lets me write a DOCX file, etc. then send it to my Kindle. It automatically converts the sent file into AZW3. But during the process they add identifiable information to that AZW3.
  
  Does it contain anything else other than e-mail address and is there a simple way to remove the identifiable info, just like you can remove such info from other file formats?
  
  Note I'm not talking about DRM, just identifiable metadata.
  
  
  (I've pixalated the blue highlight which has the username's e-mail address)
upvoted_answer: You can edit the AZW3 format with the calibre editor.