Bluesky is even worse, some of their emails come from "[email protected]".
They have to make posts to assure people it's not a scam, especially as they'll ask you to mail ID etc to that address:
Sending your id to a social media IS a scam.
At least Bluesky has an excuse of not being a Fortune 50 company. What’s Microsoft’s excuse?
Microsoft is the 4th largest company in the world.
There should be a long list of companies whose policies are worse than theirs.