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Bounce Rate — Definition

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

Bounce Rate: The percentage of sent emails returned undeliverable, hard and soft combined — with hard-bounce rate the figure that matters.

Definition

The percentage of sent emails returned undeliverable, hard and soft combined — with hard-bounce rate the figure that matters.

Bounce Rate: The percentage of sent emails returned undeliverable, hard and soft combined — with hard-bounce rate the figure that matters, per the B2B Data Index glossary (2026).

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Why it matters in practice

Under 2% is the professional operating standard; sustained rates above it damage reputation independent of spam complaints.

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Frequently asked questions

What is bounce rate?

The percentage of sent emails returned undeliverable, hard and soft combined — with hard-bounce rate the figure that matters.

Why does bounce rate matter?

Under 2% is the professional operating standard; sustained rates above it damage reputation independent of spam complaints.

Cite this page

APA

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

Markdown

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