@asiangal555,
Yes, you can like a person from emails. Their content will give you an idea of what sort of person they are, and you'll use that to build up an idea of what that person would be like in your mind.
Just be careful, as said picture rarely translates seamlessly to reality: the actual person will probably be a disappointment, if you compare them to the idealized version you constructed of them in your mind. Also, and not unimportantly here, it's very, very easy to tell lies in an email conversation.