Verify your Mailshake prospects with BounceBlock
Mailshake runs sales engagement sequences, and unverified prospect emails bounce and drag down your sender reputation. Cleaning the list keeps reps' outreach landing.
How to clean Mailshake data with BounceBlock
Why Mailshake prospects need verifying
Sales sequences mail prospects repeatedly, so a dead address bounces again and again until you remove it.
Verifying email, phone and company in one pass — flat-priced, not per-verification credits — keeps your Mailshake prospects 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
Should I verify before a sequence?
Yes — it prevents repeated bounces to the same dead addresses.
Phone too?
Yes — for calls and SMS steps.
Flat-priced?
Yes.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.