its not possible find some one email ip address, you can only get an ip address for the main domain like face book individual persons means you cant but you can get face book ip address details about...
Yes, if email contains a real name of that person. You can then go to WAATP.COM and find more informations about that person, including his physical address and even his phone number.
Ring your ISP; they'll help you. And once you have it again, keep a note of it next to your computer, in an out-of-sight location if you share your computer. Or store it on your phone.