Hello @amyloo ,
There isn't really a best template for forwarding. Since forwarding emails in an email program will result in essentially re-writing and restructuring the code, we have no way of controlling how the formatting will be changed by the program. In this regard, it'd be better to have the people you're forwarding to as contacts so we can just send the emails directly to them.
If you're unable to add them as contacts to send the emails directly to them, then your best bet for making sure the integrity of your email is maintained would be to provide the email's permanent URL to those people.