Outlook Spam Filter: How It Works & How to Avoid It
Efficient email communication hinges on reliable spam protection, and Microsoft Outlook’s built-in filters rank among the most widely used. Yet, legitimate messages sometimes land in the spam folder, while unwanted junk still slips through. According to email delivery statistics by GlockApps, in Q2 of 2025, the average spam rate among mailbox providers in Outlook was 47,31%. This is the highest spam rate among the providers overall.