Verify your lemlist leads with BounceBlock
lemlist cold campaigns live or die on list quality — a bounce-heavy send hurts the domain you worked to warm up. Verifying the leads first keeps your campaigns landing.
How to clean lemlist data with BounceBlock
Why lemlist leads need verifying
Cold-outreach lists are usually older and unverified, so bounces run high unless you clean them before the first send.
Verifying email, phone and company in one pass — flat-priced, not per-verification credits — keeps your lemlist leads deliverable and your reporting honest. A native sync is on the roadmap; today it's a quick CSV round-trip or a real-time API check.
Ready to see what’s hiding in your list?
Upload a file and preview your first 100 verifications free — email and phone, in one pass.
Frequently asked
Will this protect my warmed domain?
Yes — removing dead addresses before sending is what keeps a warmed domain healthy.
Phone too?
Yes — for multichannel outreach.
Flat price?
Yes.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.