title_body: Start Calibre, update feeds, transfer files and close I want to use Calibre for subscribing to RSS feeds, download new articles and bundle them in .mobi files. These files should be send to my Kindle via mail.
  
  Both these processes work without problems, but I do not want to have Calibre running all the time.
  
  Are there command line parameters that allow me to let Calibre only fetch the feeds and send them to my Kindle and then close?
  
  I know I could just let start Calibre after booting and then close it manually, but an automatized version would be nicer.
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)