I HATE this new feature. WHY???? WHY WOULD YOU DO THIS?! That's a rhetorical question. I don't really care, I just want it to stop.
More than half of my emails are coming through with this warning message and it's not helpful at all. It makes sifting through my inbox more challenging now, as it's more visual "noise" I need to tune out. I get messages from new folks on a daily basis seeking help and now all of these get flagged. This is a HORRIBLE feature for business owners trying to manage incoming messages clients who are seeking help.
If you're going to add new features like this, the least you could do is make them optional so they can be turned off.
****, Microsoft.