One bad list from a careless client can burn your agency sender reputation and tank all your other campaigns. BounceZero verifies every list before it touches a sending domain.
Agencies carry a risk no in-house team faces: you send from shared infrastructure on behalf of clients whose list hygiene you didn't control. One bad upload affects everyone.
A single client list with a 10% bounce rate can push your shared sending domain onto blocklists - tanking deliverability for every other campaign your agency runs that week.
Email lists decay at roughly 22% per year. That "fresh export" a client hands you was pulled from a CRM last touched in 2023. Verifying before launch is the only safe assumption.
Around 23% of B2B domains are catch-all - they accept everything at SMTP time, then bounce or spam-trap later. Basic verifiers pass them; BounceZero runs a 3-probe catch-all analysis.
Whether it's a 500-row founder list or a 500,000-row enterprise export, every email goes through the same six-layer verification pipeline.
Live SMTP-level confirmation that the mailbox actually exists - not just that the domain accepts mail.
Triple-probe analysis flags catch-all domains that would silently inflate a client's "valid" numbers.
Flags info@, sales@ and admin@ addresses that hurt engagement metrics and trigger spam complaints.
Catches throwaway addresses from temp-mail services that pollute client signup lists.
Confirms the domain has valid, reachable mail servers before a single send is attempted.
Identifies likely spam traps - the addresses that get agency sending domains blocklisted overnight.
Make verification a standard step in your campaign launch checklist - from client handoff to clean send in minutes.
Client sends their CSV - CRM export, event scans, purchased data, whatever lands in your inbox.
Drag and drop up to 1,000,000 addresses per dashboard job, or push lists programmatically via the API.
All 6 checks run on every address. A 10K list finishes in 5-10 minutes.
Download segmented results - valid, risky, invalid - and share the hygiene report with your client.
Load only verified addresses into the sending platform. Cleaned lists bounce under 0.5%.
No per-seat fees. No client caps. Pay only for verifications - and bill it straight through as a line item on your retainers.
No credit card required. Test the accuracy on a sample of your trickiest client list before committing.
Start FreeA 50K-subscriber client list cleaned for $150. Compare that to the cost of a blocklisted sending domain mid-campaign.
See Bulk PricingNot sure what dirty lists cost you? Run the ROI calculator.
New to verification? Start with the complete email verification guide.
What marketing agencies ask before making BounceZero part of their launch checklist.
Agencies send on behalf of multiple clients, often from shared domains and IPs. One client's dirty list can damage deliverability for every account you manage. Verifying each list before launch isolates that risk - a cleaned list keeps bounce rates under 0.5%, well below the thresholds ESPs monitor.
Yes. Each list is a separate bulk job with its own downloadable results, so you can keep per-client segmentation clean and share the hygiene report with each client. Dashboard jobs support up to 1,000,000 addresses, and a 10K list processes in about 5-10 minutes.
BounceZero delivers up to 99.8% accuracy in internal testing on SMTP-verifiable addresses, versus an industry benchmark of around 95%. On a 100,000-email client list, that difference is roughly 4,800 misclassified addresses - bounces you'd otherwise send into, or valid leads you'd otherwise throw away.
Around 23% of B2B domains are catch-all, meaning they accept any address at SMTP time. BounceZero runs a 3-probe catch-all analysis to determine deliverability confidence instead of blindly marking these addresses valid, which is where cheaper verifiers quietly fail.
Yes. The BounceZero API responds with timing that varies by provider and verification path on average, so you can verify addresses in real time at form capture or push entire lists programmatically before every send. Full documentation is available on the API docs page.
Pricing is $3 per 1,000 verifications with no subscriptions or seat fees. A 25,000-contact client list costs $75 to fully verify - and you get 100 free verifications every month to test with, no credit card required.
up to 99.8% accuracy in internal testing on SMTP-verifiable addresses. $3 per 1,000 verifications. Results in seconds. Start with 100 free verifications every month - no credit card required.
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