A single bounce spike in Outreach can tank your domain health score and suspend your sequences. BounceZero removes invalid emails before they ever enter your sequence.
100 free verifications/month - No credit card required
Outreach.io is the engine room of an enterprise revenue team - and it actively monitors your sending health. Feed it a stale prospect list and the platform itself becomes the first thing to punish you for it.
Outreach tracks bounces per mailbox and rolls them into your domain health signals. One bad import - 1,500-3,000 hard bounces per 10K unverified prospects - is enough to drag that score down, trigger governance rules, and get sequences paused mid-quarter while your pipeline sits frozen.
A multi-step Outreach sequence executes emails, call tasks, and LinkedIn steps for every prospect. When the address bounced at step one, every downstream touch is wasted rep capacity. With B2B emails decaying at 22% per year, a year-old list quietly wastes a fifth of your sequence throughput.
Outreach delivers through your own Google or Microsoft mailboxes, so every hard bounce counts against your company domain - not Outreach's. Providers start throttling senders at around a 2% bounce rate. Once flagged, even replies to real, engaged prospects land in spam.
Every address destined for Outreach.io passes through the full BounceZero pipeline - results in seconds, with a clear verdict and confidence score per prospect.
We connect to the recipient mail server and confirm the exact mailbox exists - catching prospects who changed jobs before they consume a single Outreach sequence step.
Around 23% of B2B domains accept all mail. Our 3-probe technique separates genuinely deliverable addresses from risky catch-all noise other tools mark "valid".
Flags info@, sales@ and admin@ addresses before they reach a sequence - low-intent inboxes that drag down reply rates and generate spam complaints.
Identifies temporary and throwaway domains so they never enter your Outreach sequences or distort your team's engagement analytics.
Confirms the domain still has live, correctly configured mail servers - dead domains are a common failure mode in aging CRM and prospect data.
Screens against known spam trap patterns and recycled addresses. One trap hit can blocklist the domain behind your entire sales engagement stack.
Five steps from raw prospect list to a clean Outreach.io import. A 10,000-prospect file is verified in 5-10 minutes.
Export the prospects you plan to sequence - from Outreach.io itself (Prospects view > export to CSV), your CRM, or the enrichment tool feeding your pipeline. Keep the email column plus any fields you want to preserve.
Drag and drop the file into the BounceZero dashboard. We auto-detect the email column and deduplicate. Dashboard jobs up to 1,000,000 addresses are supported.
Each prospect runs through all 6 checks - mailbox existence, catch-all 3-probe, role, disposable, MX, and spam trap screening. A 10K-row file completes in about 5-10 minutes.
Get your file back split into Valid, Risky (catch-all), and Invalid, with a confidence score per address - and every original column (name, account, title) intact for a clean re-import.
Re-import only the Valid segment into Outreach, map your fields, and add the prospects to your sequence. Every step now executes against a real inbox, your bounce rate stays under 0.5%, and your domain health score stays green.
Automating your Outreach.io pipeline? Our real-time API responds with timing that varies by provider and verification path on average - verify each prospect the moment it syncs into Outreach from Salesforce or your enrichment tool.
$3 per 1,000 verifications. Compare that with what a suspended sequence costs your quarter - and what a damaged sending domain costs long after.
Want the exact numbers for your list size? Try the ROI calculator or see bulk pricing tiers.
Common questions from revenue teams verifying Outreach.io prospects with BounceZero.
Yes - via CSV workflow and API. Export prospects from Outreach.io (or the CRM and enrichment tools feeding it) to CSV, upload to BounceZero, and re-import the cleaned file in minutes with all your original columns intact. For automated pipelines, our real-time API (provider-dependent response time) can verify each prospect as it syncs into Outreach from Salesforce or your data provider, so nothing unverified ever enters a sequence.
Yes. Outreach monitors bounce rates per mailbox and factors them into your domain health signals, and its governance features can pause or throttle sending when bounce rates spike. Beyond Outreach itself, Google and Microsoft start throttling senders at around a 2% bounce rate - an unverified list typically bounces at 15-30%. Verifying before import keeps cleaned lists under 0.5%, so neither Outreach nor the mailbox providers ever see a spike.
Before importing. If a bad address never enters Outreach, it can never consume a sequence step, generate a bounce from your domain, or drag down your domain health score. Verifying at import also keeps your Outreach prospect database clean over time, instead of accumulating dead contacts that reps keep re-sequencing quarter after quarter.
Around 23% of B2B domains are catch-all, meaning the server accepts mail for any address - so a simple SMTP check can't tell real from fake. BounceZero's 3-probe catch-all technique scores deliverability confidence for these addresses, so you can sequence high-confidence catch-alls and hold back the rest instead of discarding a quarter of your prospect list.
Typically 5-10 minutes for a 10K-row file, and single dashboard jobs scale up to 1,000,000 addresses. Results come back segmented into Valid, Risky, and Invalid with a confidence score per address, and your original columns (name, account, title, phone) are preserved for a clean Outreach.io re-import and field mapping.
BounceZero costs $3 per 1,000 verifications with no subscription - cleaning a full 10K import costs $30. That's a rounding error next to one Outreach seat, and you get 100 free verifications every month with no credit card, so you can test the workflow on a small segment before your next big 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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