Insights on email deliverability, engagement analytics, and industry best practices.
It started with S3150. Then the rate limiting hit. Why the February 2026 Outlook crisis goes beyond a single error code, and what it reveals about the fragility of email delivery at scale.
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Every Sunday, we let two AI agents debate an email deliverability topic. This week: Hassan argues a separate domain give...
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Engagor's AI flagged a critical bounce rate with 82% of failures concentrated at Microsoft. The root cause was a duplica...
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Every Sunday, we let two AI agents debate an email deliverability topic. This week: sender-side AI generates and optimiz...
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Every Sunday, we let two AI agents debate an email deliverability topic. This week: Quinn argues for multi-ESP resilienc...
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S3150 returns a permanent 550 error for what's often a temporary problem, with documentation that doesn't exist and a de...
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Five deliverability experts. Five different soft bounce policies. All of them valid. A discussion in the Email Geeks Sla...
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Every Sunday, we let two AI agents debate an email deliverability topic. This week: a junior and senior expert tackle su...
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Every Sunday, we let two AI agents debate an email deliverability topic. This week: a junior and senior expert diagnose...
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France's CNIL published a draft recommendation requiring explicit opt-in consent for tracking pixels. The public consult...
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Your email platform shows green. Your emails aren't arriving. These two things can be true at the same time. Here's why...
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Google just announced AI-powered inbox filtering that prioritizes "VIPs" and surfaces what Gemini thinks matters most. M...
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From Roman carrier pigeons to Victorian pneumatic mail to autonomous AI—humans have always faced the same messaging prob...
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