Hi Eberling,
The emails are managed bu BuddyPress. These email templates are located at Dashboard > Emails and it is here that you go to edit their contents.
You can edit and customize the header, body and footer of the emails in Dashboard > Emails > Customize whilst Dashboard > Emails > All Emails allows you to modify the content.
When editing the content of your emails you will need to refer to the BuddyPress Codex for Email Tokens that are used in these emails.
Hope this will help you.
Best,