The title may mean it in the sense of being unannounced

"Quietly" in the title is an AI slopspam pattern. It's an over-used teenager hyperbolic crutch word on par with "literally", "actually", "honestly" and similar.

Sometimes it's use is appropriate, but not in this case. Microsoft announced this change loudly, multiple times, starting more than a year ago. I seem to recall one of those announcements being discussed here on HN. Even the article links to it's own previous announcements, so "quietly" here is stupid rage bait to justify a blogspam advert.

The word "quietly" has now been dropped from the link title, but still appears on the original.

Real men do not review their articles, they post them on HN and have the whole world review them :)

> Nobody has found a Microsoft announcement of it. That's what "quietly" means.

No. The word 'quietly' attaches to the word 'rejecting' in the title in which it was used. Microsoft were not quietly rejecting messages; they were doing so conspicuously and in conformance with international standards for reporting such.

By all means, they introduced this change without prior warning, and it appears that it was a screw-up rather than a deliberate change:

https://www.theregister.com/applications/2026/11/09/outlookc...

But that is not the same thing as doing so quietly.