I have O365, hotmail & gmail accounts - O365 I only use for work and virtually never use the address for anything except a few work-related services, plus it's

I have O365, hotmail & gmail accounts - O365 I only use for work and virtually never use the address for anything except a few work-related services, plus it's a new address so sure, that's spam free (so far). If MS have actually found a way to accurately filter out spam on O365 they definitely haven't applied the same tech to hotmail/live mail. Gmail's no any better (though I only use that account rarely).