Protect PHP Mail Forms from Direct Access and Email Injection
Your PHP contact form might be quietly forwarding spam to thousands of addresses. Here's how email header injection works, and how to close the door.
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Security
3 posts
Spam Filtering Without CAPTCHA: What Actually Works
CAPTCHAs cost you conversions. Here's how modern spam filtering works invisibly — and why it catches more spam than a puzzle ever did.
Why Bots Bypass Traditional Spam Filters (And What to Do About It)
Keyword lists, IP blocklists, and CAPTCHAs were built for a different era of spam. Here's how modern bots evade all three — and what defenses actually hold.