How do you attach one email to another in yahoo mail?

How do you attach one email to another in yahoo mail?

• I would like to attach an email I received from a vendor to an email I am sending to another vendor. I tried to attach it, but when I sent it to myself, I could click on my inbox and read all my mail. I really do not want the vendor to read my other emails. How do I attach the email so the vendor cannot read all my emails.

• Answer:

  Highlight with your mouse what you want to send > Right click with mouse select copy. > Then in a compose screen right click mouse select Paste. Try keeping out all your links and buttons of email address.