Why it works
Recognition dies from neglect, not from a lack of good work — people just forget to say it. A standing weekly prompt makes appreciation a habit, and the fresh content is entirely in the replies. The email is identical every week, which is exactly why one scheduled send can run the ritual indefinitely.
Make it yours
Collect the replies and share them in your all-hands, a channel, or a Friday wrap-up. Keep it opt-in and light — the moment it feels like a mandatory form, the warmth drains out of it.