In outlook, when you reply to an email, it appends the email thread to the bottom of the email document but inserts a blue line across to separate and demarcate the start/end of the email.

I want to copy and paste the email body from another email complete with the "From, Sent, To, CC, Subject" headers and then insert the blue line to create the consistent email boundaries.

How can I do that?

(email here and there... seriously lack of words to describe)