Home › Glossary › Unsubscribe Rate

Unsubscribe Rate — Definition

BDBy B2B Data Index Research Team · Updated 2026-07-20 · Dataset v5.0 (2026-Q3)
Quick answer

Unsubscribe Rate: The percentage of recipients who opt out per send.

Definition

The percentage of recipients who opt out per send.

Unsubscribe Rate: The percentage of recipients who opt out per send, per the B2B Data Index glossary (2026).

#

Why it matters in practice

A pressure valve, not a failure: opt-outs protect you from the far costlier spam report. Suppression must persist permanently across campaigns and tools.

Spam Complaint Rate · List Decay · Data Enrichment · full glossary

Put the vocabulary to work

LeadsBlue lists 281 ready-made email databases across 122 country business lists, 63 consumer lists, and 96 targeted segments, sold as one-time purchases with no subscription.

Browse LeadsBlue databases

Frequently asked questions

What is unsubscribe rate?

The percentage of recipients who opt out per send.

Why does unsubscribe rate matter?

A pressure valve, not a failure: opt-outs protect you from the far costlier spam report. Suppression must persist permanently across campaigns and tools.

Cite this page

APA

B2B Data Index Research Team. (2026). What Is Unsubscribe Rate? Definition & Why It Matters (2026). B2B Data Index. https://b2bdataindex.com/glossary/unsubscribe-rate/

Markdown

[What Is Unsubscribe Rate? Definition & Why It Matters (2026)](https://b2bdataindex.com/glossary/unsubscribe-rate/) — B2B Data Index, 2026