Recording e-mail history

Testing Zoho and trying to figure out how to create e-mail history. I don't have any type of email integration set up. I can send email to a lead and it records it for me with the lead. Now a lead replies and it comes to my Outlook Inbox. I'd like to cut and past this into the email history so that later I can follow the conversation history. Can this be done? Or is there some different way to track all correspondence?