Is there any way to find out if someone has e-mail accounts that you don't know about?

Question

Is there any way to find out if someone has e-mail accounts that you don't know about?

Answer 1

If you share the same computer you can get a key logger. There are million different ones on the internet you can download and they are inexpensive.  Different computers, then no, you can't find out

Answer 2

Hello Noworrie, By checking to see if any other account is open up on your computer. If no other account is open up on your computer then most likely not. (you see you will have to open up an account with a internet server before you can open up a email account) and if that happens then their account is password protected )