Forwarding Problem

When one forwards an email that one receives from another emailer, the original email address and messesage appears at the bottom on my forwarding email.  I used to be able to delete who sent me this email and if I elected to change the email I could also delete and change before sending.  Now I can not do that.  Something happened.  Please tell me how or what happened and how I can go back to the previous way of forward emails without the tag along email and emailer's address.