Google Enforces Authentication Barriers Self-Hosted Email Cannot Cross

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Since November 2025, Gmail has moved from filtering to rejection for email that fails authentication. The technical bar for self-hosted email has risen beyond what individual operators can sustain.

What Is Exploitarium? Understanding the Zero-Day Repository

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Exploitarium is a GitHub repository that published proof-of-concept exploits for previously undisclosed vulnerabilities across multiple open-source projects, sparking debate about disclosure ethics and weaponizing security research.

Why Giving Your Printer an Email Address Means More Than You Think

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When a self-hoster gave their printer an email address to stop family requests, they illustrated a larger pattern: cloud services vanish, local infrastructure persists, and the boundary between convenience and control remains contested.

The Blue Checkmark Comes to Email – And Costs $1,500 a Year

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Gmail displays verified checkmarks next to authenticated senders who obtain certificates costing up to $1,500 per year. The requirement structure reveals how email authentication is adopting the visual language of social platforms while preserving a fundamentally different economic model.