> To me - as someone not in the Microsoft ecosystem
And the fact that they are managing their own Postfix seems pretty clear.
As someone in the MS ecosystem at work, I'm using this feature daily (after thinking that it was stupid in the early days)... but I make sure to only use it with coworkers or partners that I know are in the MS ecosystem.
I 100% understand someone being annoyed when they receive an email telling them that someone added an emoji to their email.
Sometimes during the weekend MS is sending me an email recap of the reactions I received during the week and it pisses me off.
The email reactions should be silent and that's their goal: a quiet ack.