Add a "Why am I receiving this?" section to emails.

What is the challenge?

It is possible for users to indirectly watch records by watching some of its parents, as described here.

What is the impact?

From time to time, we receive support requests asking why the customer is receiving email notifications for a particular record if they don't show up as watchers for it.

Describe your idea

I think having a section somewhere in the notification email labeled "Why am I receiving this?" with an explanation along the lines of "You are receiving this email because you are a watcher on Release ABC-R-123" would go a long way helping them understand why they're getting that particular email.