Where can I go to get info on an email

[Volholic]

address.
I had someone contact me about one of my domain names.
I googled it but could not find anything
Any suggestions?
It is an LLLL.com

They just sent me a generic email from gmail
Can anyone help and if I cant find out anything about the person how would you respond to the email to gauge their interest and how much they are willing to pay.
Thanks

 

[Keynes]

Gmail is pretty anonymous; you're likely not going to be able to find out much about the person -- unless you are clever in your emails or ask to talk on the phone about the possible sale.