You could also right click on one of the dodgy emails and mark it as Spam, or add the sender to a 'Blacklist' so that future emails go straight to your Spam folder or Deleted folder without appearing in your inbox. Often though the sender or email title change with a random number so that it makes it hard to auto-spam them. If this is the case try to set the domain name as spam (the ending of the email address - eg '@hotmail.com').
Never open the emails, but right clicking them should give you some options.