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Email segmentation checklist for 2026

Short answer

A complete email segmentation checklist has 5 setup items and 2 things to audit against. Work through setup in order, then schedule a quarterly review.

Setup checklist#

  • ☐ Define 3 to 5 core segments: new subscribers, engaged, at-risk, customers, and lapsed.
  • ☐ Capture the data needed at signup and through behavior tracking.
  • ☐ Build dynamic segments that update automatically as behavior changes.
  • ☐ Tailor cadence and content per segment; engaged contacts tolerate more frequency.
  • ☐ Measure revenue per recipient per segment, not just open rate.

Audit checklist#

  • ☐ Confirm you are not: over-segmenting into groups too small to learn from.
  • ☐ Confirm you are not: relying on open rates after Apple Mail Privacy Protection inflated them.

Ongoing monitoring#

  • ☐ Weekly: review provider dashboards (Postmaster Tools, SNDS) and bounce logs
  • ☐ Monthly: re-run the setup verification after any vendor or DNS change
  • ☐ Quarterly: full audit against this checklist

Frequently asked questions#

What is the simplest segmentation to start with?

Engagement recency: opened or clicked in the last 30, 90, or 180 days. It drives both relevance and deliverability.

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