Well u wanna track ur victim or want to get his ip, location, browser settings, language or timings.... all u have to do is get his e-mail id...
Once u have it.
Once registered . . . send a mail to ur victim by the email id u registered at readnotify.com
But before sending the mail just add ".readnotify.com" with the victims id.. for example
when ever victim opens it his all the info will be mailed to u.
which can b very useful for the hackers.
Note = U can also change the settings in