Free tool
Email Verification ROI Calculator
Estimate how many invalid addresses a verification pass will catch and what your bounce rate drops to. Advanced mode adds send costs and reputation value to show net ROI.
How it works
- 1Enter list size and your estimated (or current) invalid rate.
- 2We show invalid addresses caught and your projected post-clean bounce rate.
- 3Advanced: add cost per send to see the money saved per campaign.
Questions
Frequently asked
How many invalid emails will I have?
It depends on age and source — purchased and old lists often run 15–30% invalid, opt-in lists far less. Enter your best estimate; the calculator does the rest.
Does verification pay for itself?
Usually quickly — it protects sender reputation, cuts wasted sends and lifts deliverability across every future campaign, not just the one you clean.
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.
100 free creditsNo credit cardCancel anytime