My Outlook inbox is suddenly getting a ton of spam and I don't know how to stop it

MS will not listen to anything else but a class action IMHO

You can try making some rules. The SPAM i received had more or less the same keywords, so i made a rule (settings-> mail -> rule) that checks for subject includes and message body includes the spam words and in action select to move them on junk folder and make them read (or delete them). I prefer to have them on junk folder so i can check for false positives.

Hope this helps a bit.

Best thing would be if they fix their SPAM filters.. last couple of days i getting really obvious spam on my inbox!

No, your answer didn't help at all.

The point is to block completely those spams, to receive the sender a message from his/her mail host as undelivered. To not even come to my email. Not to go even to spam or deleted folder.

I have moved from Outlook to Gmail. I always used or tried everything Microsoft. Mail has become unusable. Every day I'm checking if I missed something within the avalanche of spam. Most accounts, newsletters etc that are not Microsoft I moved to Google. Cloud storage too. It's just to risky missing important stuff. So yeah, after 20+ years Google is getting my money now.

Bye Microsoft, it's been nice knowing you. Stop trying to get me back.

I have the same problem. I even paid for the $19.99 per year subscription that promises to stop ads. Don't do I

it. I have found that spam emails are not considered ads by Microsoft. I think the flood of spam emails is a ploy to get you to purchase the paid subscription which is supposed to stop said emails. Don't fall for it.

I have managed to trace the source of my constant spam emails I have been receiving. Two days I didn’t check and had 1600 emails to delete. Multiple sign ups to the same websites mailing lists.

Turns out it’s to do with a company called klaviyo who are partners of Shopify, these emails started shortly after purchasing a subscription for a Shopify store. I’ve contacted Shopify who refuse to take action, I’ve also contacted klaviyo U.K. head office in London who refuse to put a stop to it. We need to shame them for their bad practices!