Soon after they launched Outlook Reactions in 2022, Microsoft received requests to disable the feature. Now you can by adding SMTP headers to messages. Outlook clients will be able to add the header to stop recipients reacting and organizations will be able to create mail flow rules to add the header to selected messages. It’s nice to have a way to disable reactions.
Users will soon have the option to use Outlook reactions to respond to emails received from people inside the same tenant (well, it also works with some other tenants). It’s the same kind of feature that already exists in Yammer and Teams, but whether this kind of response works with email remains to be seen. It’s a cultural thing!