is this spam?

I've been receiving this email for years, both to an address registered with Microsoft and to one that, to my knowledge, I didn't register with Microsoft, but I'm not entirely sure. Is this spam or not? The internet says the sender's address is trustworthy, but it doesn't have to be the real one. I don't want to click on the link, but I did in the past and ended up on a Microsoft page. Google classifies it as spam because the sender has been known for phishing in the past.