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Email whitelists and spam filters take opposite approaches to inbox protection. Here's what each method does, where it fails, and which one actually stops AI-generated cold email in 2026.
Email CAPTCHA blocks 99.8% of automated spam but may delay legitimate messages. Here's the complete analysis.
See real email CAPTCHA examples and learn how they block 99.8% of automated cold emails while keeping legitimate messages flowing.
Learn how sender verification email systems authenticate legitimate senders and block AI-generated cold email spam at the gate.
Email CAPTCHA blocks AI spam by requiring senders to verify they're human before messages reach your inbox. Here's how it works.
Compare the top inbox protection tools to find the right solution for blocking spam and managing email overload.