How do i get someone email address from their IP Address?

You don't and can't... the IP address is like the address on your house or where you work.... just an indication of where the computer is located.... you can identify what city their ISP is located in, but nothing further...... If you were law enforcement, had a court order/search warrant you could get the records from the ISP as to who that address (IP address) belonged to.... but again, that would not give you any email addresses....... That same IP could be a computer used by someone with dozens of different email addresses from dozens of different email program providers.... You could have email addresses with Yahoo, MSN, AOL, Gmail, and so forth.... all being addressed by the computer at the same IP address......

How do i get someone email address from their IP Address?
You dont. Email address's are custom to the user who makes the name. The only way I can think of is a keylogger or virus of some sort but I dont recommend that.
Reply:Your can't. Email is usually from the email server or system (like Yahoo mail). The IP address of a computer has nothing to do with what mail server they use.