So you want to hack an email address, right? Well let's just assume that this email is actually yours and you've forgotten your password. (this will work for any account, but you shouldn't be doing that, right?)
*NOTE* I am not responsible for your actions using these programs. Retrieving the password for other people's emails is illegal, and you should not do it.
1. First, download Webmail Hack 2.3 or Webmail Hack 2.4 (either will work) and complete the steps necessary for getting your unique key.
DOWNLOAD LINKS AND INSTRUCTIONS
2. Once you have your unique key (the steps in the above tutorial only take 2-3 minutes, so it's definitely worth it) and you have Webmail Hack setup, enter the email that you want the password for.
3. In about 15 seconds you should have the password for the email you entered.