I have never used hotmail but I assume it operates in a similar manner to e-mail clients such as Outlook Express or Thunderbird. In these, you have to select 'Forward' with the approriate e-mail open. This opens a new e-mail write template with the content of the forwarded e-mail contained within it. Besides inserting your own input, namely adresses and your own text, you are then able to delete any part of the forwarded content, including addresses.
Hands-on: Samsung Galaxy S8 review