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.
Surface Pro (2017) vs Surface Pro 4