Hi @Anonymous ,
From the perspective of Outlook desktop client, please refer to the suggestions below:
- If the spam mails are coming from a specific sender or domain, you can add the sender or domain to the block list via Home > Junk > Junk Email Options > Blocked Senders:
- If the spam mails are from random senders, it's recommended to adjust the Junk Email protection level to a more aggressive one like Low or High:
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