Free tool
Bounce Rate Predictor
Answer a few questions about a list's age, source and verification status to get a predicted bounce-rate range. Advanced mode factors in size and time since last clean.
How it works
- 1Pick the list's source and how old it is.
- 2Advanced: add list size, % unverified and months since last cleaned.
- 3Get a predicted bounce-rate band and a send/clean recommendation.
Questions
Frequently asked
How can you predict a bounce rate?
Bounce risk tracks closely with list age, source and verification status. This tool turns those signals into an estimated range — it's a guide, not a guarantee.
What if the prediction is high?
Verify before you send. A verification pass removes the invalid addresses driving the predicted bounces, pulling the real rate back under the safe threshold.
Can I check a whole list at once?
This free tool checks one at a time. To verify a full list — email, phone and company together — upload a CSV to BounceBlock and preview your first 100 rows free.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.
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