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Guide

Email Verification Terminology

Shared terminology helps product, marketing, and support teams interpret deliverable, risky, undeliverable, unknown, role, disposable, and accept-all consistently.

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Core result categories

Deliverable: safe to send under normal policy. Undeliverable: do not send. Risky: reachable but uncertain. Unknown: check could not complete confidently.

Flags add nuance: disposable providers, role accounts, free webmail, and accept-all domains.

Action checklist

  • Publish internal definitions
  • Map each term to a product action
  • Avoid treating risky as automatically invalid
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Put this guide into practice

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