Upload any email list and BounceZero's 5-stage pipeline cleans every address — removing invalids, disposables, catch-alls, and spam traps before your next campaign.
Three simple steps from raw list to clean, deliverable contacts.
Drop a CSV or Excel file containing your email addresses. BounceZero automatically detects the email column — no formatting required.
Each address passes through 5 verification stages: syntax analysis, domain intelligence, SMTP verification, reputation signals, and ML scoring — in parallel.
Download your cleaned list as a CSV with status labels: Deliverable, Risky, Undeliverable, and Unknown — ready for direct import into your ESP.
BounceZero detects and flags every type of problematic email address that damages deliverability.
Mailboxes that no longer exist, invalid domains, or addresses with typos that will always bounce.
Temporary addresses from services like Mailinator, Guerrilla Mail, and 3,000+ disposable providers.
Domains configured to accept all inbound emails regardless of whether the specific mailbox exists.
Known honeypot and recycled spam trap addresses maintained by blocklist operators to catch poor senders.
Generic addresses like admin@, info@, support@, sales@ that rarely map to a real individual inbox.
Addresses where the mail server blocked the probe. Flagged separately so you can decide how to handle them.
Every email service provider (ESP) monitors your bounce rate. Exceed 2% hard bounces and your account gets flagged. Exceed 5% and you risk suspension — meaning legitimate campaigns to valid subscribers also fail.
Industry data shows that email lists decay at roughly 25% per year. A list collected 18 months ago may have 30-40% invalid addresses. Sending to those addresses signals poor list hygiene, which damages your sender reputation and inbox placement.
BounceZero bulk validation removes that risk. Clean your list before every major campaign, or use our API to validate at the point of collection.
Lower bounce rates signal good list hygiene to mailbox providers, improving your reputation score and inbox placement rate.
Most ESPs charge per email sent. Removing 20-30% invalid addresses from your list directly reduces your monthly sending cost.
Spam trap hits and complaint rates from invalid addresses can get your IP or domain added to blocklists, affecting all future sending.
BounceZero processes bulk lists at up to 100,000 addresses per hour using a distributed verification pipeline. A list of 10,000 addresses typically completes in under 10 minutes. You'll receive an email notification when your results are ready to download.
You can upload CSV files with email addresses in any column. Excel (.xlsx) files are also supported. BounceZero auto-detects the email column and handles headers automatically — no reformatting required.
After validation, your list is available for download for 7 days, then automatically deleted. BounceZero stores only hashed fingerprints of verified addresses for caching and never sells or shares your contact data with third parties. We are fully GDPR compliant.
New accounts receive 100 free verification credits — no credit card required. Paid plans start from $19/month for 5,000 verifications. Pay-as-you-go credit packs are available for one-time list cleaning without a subscription. See our pricing page for full details.
Yes. The BounceZero REST API lets you verify individual addresses in real time or submit bulk jobs programmatically. This is ideal for validating at point-of-collection (signup forms, CRM imports) or integrating into your data pipeline. See our API documentation for details.
Sign up free, upload your list, and download clean results in minutes. No credit card required.