Reduce Bounce Rate in two minutes
Email bounces divide into two types with very different consequences: soft bounces signal temporary delivery failures like a full mailbox, while hard bounces mean the address is permanently unreachable and should never be mailed again. Most ESPs will suspend or throttle accounts that exceed roughly 2% hard bounces, a threshold that is easy to hit if you mail a list that hasn't been verified recently. Reducing bounce rate is therefore less about aesthetics and more about protecting your ability to send at all.
What's hiding in your list
Distinguishing hard from soft bounces in your ESP's reporting requires careful reading — some platforms lump both under a single "bounce" label, masking the true hard-bounce proportion.
Addresses that soft-bounced three times in a row behave functionally like hard bounces but often remain on active lists because they were never formally unsubscribed.
Re-engagement campaigns sent to long-inactive segments tend to spike bounce rates because address decay has already occurred but hasn't been surfaced yet.
Email and phone — cleaned in one pass
Verify in one pass
Every email checked for deliverability and every phone validated — in a single upload.
Catch what others miss
Typos, catch-all domains, disposable addresses, dead numbers and silent duplicates.
Flat, simple pricing
Drop bounces below 2% before you hit send. No per-credit math, no surprise overage bills.
Clean leads in three steps
No setup, no integrations, no learning curve. Upload a file, download a better one.
Upload your CSV
Drag in any contact list. We auto-detect email, phone, name and company columns.
We verify everything
Every email checked for deliverability, every phone validated, duplicates flagged — with a live quality score.
Download clean leads
Export a verified, deduplicated list your team can actually call and email.
Email and phone, cleaned in a single upload — see exactly how many bad contacts are hiding in your list before you pay a cent.
100 free verifications · no credit card · results in under 2 minutes
Frequently asked
What hard-bounce rate should I stay below?
Gmail, Yahoo, and most major ESPs treat 2% as the warning threshold; staying below 0.5% gives you meaningful headroom during high-volume sends.
Will verifying my list guarantee zero bounces?
No verification tool can guarantee zero bounces because addresses can become invalid between the time of verification and the time you send — but cleaning immediately before a campaign dramatically reduces the likelihood.
How does BounceBlock reduce bounce rate specifically?
It performs SMTP-level checks on every address, flags catch-all domains with a separate status so you can decide how aggressively to mail them, and marks previously-bounced patterns so known-bad addresses are caught before they re-enter your send queue.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.