Sending, receiving, and organizing email in Outlook.com
The most effective way to stop this spam is to stop relying on language or region filters and instead only allow trusted senders.
https://outlook.live.com/mail/0/
Go to Outlook Settings → Mail → Junk email, and enable “Only trust email from my Safe senders and domains,” then add your contacts and important domains to the safe list.
Next, create a rule in Settings → Mail → Rules. Set it so that any email from senders who are not in your contacts or safe list is automatically moved to Junk or Deleted Items. This single rule is the strongest protection against Chinese spam and similar campaigns because they usually come from constantly changing addresses.
After that, make sure you always mark unwanted emails as “Junk” instead of just deleting them. This helps Outlook learn and improves the filter over time. With this setup, your inbox becomes effectively whitelist-based, meaning only trusted senders can reliably reach you.
If spam still persists, it usually indicates the email address has been widely exposed over time. The most effective long-term solution is to register a new email alias and use the new alias for registrations and non-essential sign-ups.
Alias setup guide (official): https://support.microsoft.com/Outlook/add-or-remove-an-email-alias-in-outlook-com