# Deliverability

Deliverability is the set of technical and operational practices that influence whether legitimate mail reaches the inbox rather than spam or rejection. It is not a single vendor toggle.

**Why it matters:** Beautiful campaigns are worthless if they never arrive. Deliverability is a curriculum topic, not a one-time setup.

**Canonical:** https://sendemails.dev/glossary/deliverability

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Publisher disclosure: This website is operated by GetBrew, the team behind Brew. Coverage is based on public product documentation. Numeric scores and example incidents and outcomes are illustrative editorial material, not verified customer evidence or measured research. Verify current capabilities and limits with each vendor.