Microsoft's S3150: The Most Frustrating Error Code in Email Deliverability
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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We Asked Email Deliverability Experts About Soft Bounce Handling — Nobody Agreed
Five deliverability experts. Five different soft bounce policies. All of them valid. A discussion in the Email Geeks Sla...
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Open Rates Were Already Broken. France's CNIL Is About to Make It Official.
France's CNIL published a draft recommendation requiring explicit opt-in consent for tracking pixels. The public consult...
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Why ESP-Native Dashboards Can't Be Your Deliverability Source of Truth
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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We Analyzed 50 Million Email Events: Here's What Nobody Tells You About Gmail Deferrals
We analyzed 50 million email events to understand Gmail deferral patterns. What we found challenges common assumptions a...
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