HubSpot stores every contact you ever imported - including thousands that have gone invalid. BounceZero audits your CRM contacts in bulk so your sales sequences reach real inboxes.
HubSpot never deletes a contact for you. Every trade-show import, every old lead-gen form, every purchased list from three years ago is still sitting in your CRM - and roughly 22% of those emails go invalid every year as people change jobs.
HubSpot Sales Hub sequences send from your own Gmail or Outlook inbox. Every hard bounce counts against your personal domain reputation - not HubSpot's. A few bad sequences can land your whole sales team in spam.
Marketing Hub bills by marketing contact tier. Dead emails sitting in active lists inflate your contact count and your invoice. Verifying and pruning invalid contacts often pays for itself in one billing cycle.
When 1 in 5 emails in a HubSpot list is invalid, your reps chase prospects who will never reply because the mailbox no longer exists. Verified lists mean pipeline metrics you can actually trust.
Every email exported from HubSpot Sales Hub runs through our full verification pipeline - the same 6-layer analysis behind our up to 99.8% accuracy in internal testing on SMTP-verifiable addresses rate.
We connect to the recipient mail server and confirm the exact mailbox exists - not just the domain. Job-changers and departed employees get flagged before your sequence fires.
23% of B2B domains accept all mail, hiding dead addresses. Our 3-probe method resolves catch-alls that other tools mark "unknown" - critical for B2B-heavy HubSpot databases.
info@, sales@ and support@ addresses rarely convert in 1:1 sequences and often trigger spam complaints. We flag them so you can route them out of personal outreach.
Form-fill spam and temporary inboxes pollute inbound HubSpot lists. We detect thousands of disposable providers so throwaway signups never enter your nurture flows.
Companies fold, get acquired, and migrate domains. We validate live MX records so contacts at dead domains are removed before they hard-bounce.
Old imported lists are where spam traps live. One trap hit can blocklist your sending domain. We screen every contact against known trap patterns.
The full export > verify > re-import loop takes under 30 minutes for most HubSpot databases. Bulk jobs of 10K emails finish in 5-10 minutes.
In HubSpot Sales Hub, go to Contacts > select your list or active view > Export as CSV. Include the Email column and any ID column you want preserved for re-import matching.
Drag your export into the BounceZero dashboard. We accept up to 1,000,000 addresses per dashboard job - larger than any single HubSpot export you can produce.
All 6 checks run on every address: mailbox existence, catch-all resolution, role, disposable, MX, and spam trap screening. A 10K list completes in 5-10 minutes.
Your results come back tagged valid, invalid, risky, or catch-all, with all your original columns intact - ready to map straight back onto HubSpot properties.
Re-import the CSV and map the verification status to a custom contact property (e.g. "Email Verification Status"). HubSpot matches on email address, so existing records update in place.
Build an active list where Email Verification Status = invalid, exclude it from sequences and workflows, and set non-marketing status on those contacts to cut your marketing contact bill.
$3 per 1,000 verifications - usually far less than the HubSpot marketing contacts you'll stop paying for.
No subscription, no minimums, no expiring credits. Start with 100 free verifications every month - no credit card required.
Common questions from HubSpot Sales Hub and Marketing Hub teams.
Yes - via the universal CSV workflow. Export your contacts from HubSpot Sales Hub, upload to BounceZero, and re-import the verified results with the verification status mapped to a custom contact property. Because HubSpot matches on email address, your existing records update in place with no duplicates. For continuous verification of new inbound leads, you can also call our REST API from a HubSpot workflow webhook.
Usually, yes. HubSpot Marketing Hub bills by marketing contact tier, and around 22% of CRM emails go invalid each year. After verification, set invalid contacts to non-marketing status (or delete them) and many teams drop a full pricing tier - which typically covers the verification cost several times over.
HubSpot does not verify that a mailbox exists - a contact stays "active" in the CRM forever unless you change it. When the person leaves their company, the mailbox is deleted but the HubSpot record remains. BounceZero performs a live mailbox-level check, so job-changers are flagged as invalid before your sequence sends.
Around 23% of B2B domains are catch-all - they accept mail for any address, so a simple check cannot tell valid from invalid. BounceZero uses a 3-probe catch-all resolution method that determines whether the specific mailbox is real, giving you definitive results where most tools return "unknown". This matters for HubSpot databases, which are typically B2B-heavy.
Yes. Use our real-time API (provider-dependent response time) from a HubSpot workflow webhook to verify each new contact as it enters the CRM. That way disposable and mistyped emails never enter your nurture flows. See our API docs for the endpoint and code samples.
Bulk jobs process about 10,000 emails in 5-10 minutes, and a dashboard job accepts up to 1,000,000 addresses. Even a large enterprise HubSpot portal can usually be verified in under an hour, end to end - including export and re-import.
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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