Clean a Newsletter List in two minutes
A newsletter list quietly rots between sends as subscribers change jobs and abandon inboxes, and every dead address drags down your open rate and your standing with mailbox providers. Trimming the unreachable and re-verifying long-dormant subscribers keeps your metrics honest and your newsletter landing in the inbox.
What's hiding in your list
Long-lived newsletter lists accumulate years of abandoned free-mail accounts that now bounce or act as recycled spam traps.
Open-rate dashboards hide the problem — invalid addresses simply don't open, dragging the rate down without telling you why.
Re-engagement sends to never-opening subscribers are exactly the behavior mailbox providers penalize, so cleaning has to come first.
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
Keep your sends landing and your stats honest. 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
Will cleaning my newsletter list raise open rates?
Usually yes — removing addresses that can never open raises the rate among real subscribers and improves placement for everyone.
How do I treat subscribers who haven't opened in a year?
Verify them first; the ones that are still valid can go into a re-engagement segment, and the invalid ones should simply be suppressed.
Is phone validation useful for a newsletter?
If you also run SMS, yes — BounceBlock validates phone numbers in the same pass so both channels stay clean.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.