https://shkspr.mobi/blog/2024/02/safelinks-are-a-fragile-foundation-for-publishing/
Safelinks are a fragile foundation for publishing
Microsoft loves you and wants to protect you. So every time you receive an email with a link in it, Microsoft Outlook helpfully rewrites it so that it goes through their "safelinks" system. Safelinks allow your administrator, or someone at Microsoft, to stop you visiting a link which is malicious or suspicious. Rather than going to example.com, your link now goes to safelinks.protection.outlook.com/?url=example.com. Hurrah! If you accidentally click on a naughty link you won't cause chaos…

