How do I add comments to email without sending another email?

[Premier Beech]

I do email from my Inbox for my boss. How do I attach a note to the email
telling him what I have done/telling him that he needs to action this
urgently and why (not just using the Flag system).

e.g. Mail recd from client is Urgent and needs to be actioned with work he
has to do.

I want to put a note - "Jim this one is urgent, you need to action. Needs
to have XYZ information from ABC clients"

Don't want to forward the email to him (as this does not help).

 

[Vince Averello [MVP-Outlook]]

You can edit and save the mail item in place. I'd edit the item to include
the notes then flag it to make it noticeable.