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Notes on email delivery data

Practical writing for delivery and deliverability teams: what receiving mailbox providers are actually telling you, how to read it fast, and how to prove a fix worked.

August 11, 2026·8 min read

Nobody watches a dashboard at 3am. Alerting is the product.

Deliverability incidents are cheap to fix in the first hour and expensive to fix in the second week. Here's the alerting model BigStats ships — thresholds, per-domain anomalies, escalation, Slack and webhooks, and a daily digest — and why MailOps teams need all five.

AlertingMailOpsDeliverability

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August 4, 2026·9 min read

Your MTA already has a web UI. Here's why that isn't deliverability monitoring.

An MTA dashboard tells you what your server did. Deliverability work needs to know what the receiving mailbox providers decided — and why. Here's the gap, and how BigStats closes it.

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