{"title":"What is Email Spoofing and How Do You Stop | NameSilo Blog","description":"Email spoofing forges the visible \"From\" letterhead while SPF only checks the hidden envelope address, which is why SPF alone can't stop it. DMARC at p=reject closes this gap by requiring alignment between the two. BEC caused $3.05 billion in losses in 2025 per FBI IC3. 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Catch-all addresses increase spoofing-related risk.","og:url":"https://www.namesilo.com/blog/en/privacy-security/what-is-email-spoofing-and-how-do-you-stop-it","og:locale":"en_US","og:image":"https://www.namesilo.com/blog/api/media/157a99c4d8152ef6f24bebc0.png","og:image:secure_url":"https://www.namesilo.com/blog/api/media/157a99c4d8152ef6f24bebc0.png","og:image:alt":"Illustration of SPF, DKIM, and DMARC authentication detecting and blocking a spoofed email before it reaches the recipient's inbox.","article:published_time":"2026-08-26T03:14:08.359Z","article:modified_time":"2026-08-26T03:14:38.251Z","article:section":"Privacy & Security","og:image:width":"1400","og:image:height":"400"},"names":{"description":"Email spoofing forges the visible \"From\" letterhead while SPF only checks the hidden envelope address, which is why SPF alone can't stop it. DMARC at p=reject closes this gap by requiring alignment between the two. BEC caused $3.05 billion in losses in 2025 per FBI IC3. 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