Using Outlook for iOS in business environments for email and scheduling
The problem is if your Hotmail/Outlook account has been included in a data breach. This is the case with mine, and not only is the email address the target of automated spam accounts, there's multiple attempts to gain access to the account:
The Microsoft mail filters are sketchy at best. It's not too difficult to identify spam messages, but there's little success in getting them to act consistently. I've set up rules extensively, and still apparently blocked messages make their way into my inbox, not into junk mail either. There's only one solution that I'm now implementing, and that is to abandon the email account altogether in favour of another. This will take some time to ensure I've correctly re-routed all the traffic, but I have no other options on the table.