title_body: Start Calibre, update feeds, transfer files and close
upvoted_answer: You can do it easily from cron (if you are on *nix) and most probably it can be done on Windows too. Calubre includes several command line tools, but for you the most important is ebook-convert(.exe).
  
  With that you can create a mobi ebook from the RSS recipe like:
  
  ebook-convert WHATEVER.recipe WHATEVER.mobi
  
  
  Mailing can then be done like:
  
  calibre-smtp -a WHATEVER.mobi -u SENDERNAME@PROVIDER.com -p PASSWORD -r smtp.PROVIDER.com --port 587 SENDERNAME@PROVIDER.com USERNAME@free.kindle.com ''
  
  
  And set up a cron/scheduler job to automail it to you.
  
  I'd recommend to read the fine manual.
  
  (Note: this wont add the created mobi to your library! But you can do it with the calibredb command as documented here)