Upload your email list, get comprehensive verification results, and export clean data. SendSure's bulk verifier processes 30,000+ emails per minute with 99% accuracy.
Invalid emails in your list cause real damage. SendSure fixes that.
Bounce rates above 3% destroy your sender reputation and get you blacklisted by ESPs.
You're paying ESPs to send to addresses that don't exist. That's money thrown away.
Bad data skews your analytics. You can't optimize what you can't accurately measure.
Once your reputation is damaged, even good emails land in spam instead of inboxes.
Choose your list source and get verified results in minutes
Choose your list source
Upload email lists from your computer or import from your favorite email marketing tool.
Lightning-fast validation
Our 18-check engine validates every email in real-time. Watch as results stream in at 30,000 emails per minute.
View your results
Get a comprehensive overview of your list, categorized by status. Drill down into individual emails for complete transparency.
Download or send to integration
Download your verified list as CSV, or send it back to your email platform. Customize with filters to get exactly what you need.
Every clean email in your list is an opportunity. Every bad one is a liability.
Keep your sender score high to ensure your emails consistently land in the inbox, not spam.
Avoid getting flagged by ISPs and email providers. One blacklist can tank your entire email program.
Maintain list hygiene for better campaign results both now and in the future. Quality over quantity.
Free your list from hard bounces that damage your reputation with every send. Target <2% bounces.
Be confident your emails are actually seen. Deliverability can improve 20%+ after verification.
Remove invalid emails that skew your open and click rates. Make data-driven decisions with clean data.
Drive more opens, clicks, and conversions by sending only to real, deliverable addresses.
Remove typos, disposables, and fake emails before they pollute your CRM and ESP.
Stop paying ESP fees to send to invalid contacts. Verification pays for itself in the first campaign.
Every email goes through our multi-layer verification process
See how different teams leverage SendSure to achieve their goals
Your ESP warns about bounce rates. Campaigns underperform. Subscribers complain about not receiving emails.
Purchased lead lists have 20%+ bad data. Cold outreach damages domain reputation. SDRs waste time on fake contacts.
User signups include fake emails. Onboarding emails don't reach users. CAC increases due to poor conversion tracking.
Client lists are a mess. Poor results blamed on your campaigns. No visibility into list quality before launch.
Ready to see what clean data can do for your team?
Start Free Trial → Get clean results in under 3 minutes • No credit card requiredProcess millions of emails with the speed, accuracy, and security your business demands. Our infrastructure is designed for mission-critical applications.
Everything you need to know about bulk email verification
SendSure achieves 99%+ accuracy through our 18-check verification engine. We use real-time SMTP validation, DNS lookups, MX record checks, and proprietary algorithms refined over millions of verifications.
We process 30,000+ emails per minute. A list of 100,000 emails typically completes in under 4 minutes. You can track progress in real-time from your dashboard.
We accept CSV, TXT, and XLS/XLSX files. We auto-detect the email column, or you can specify which column to verify. You can also paste emails directly into the dashboard.
Absolutely. All data is encrypted during processing using 256-bit TLS encryption. Lists are automatically deleted within 30 days. We never share, sell, or use your data for any other purpose.
Each email receives a status (valid, invalid, risky, unknown), a confidence score (0-100), reason codes explaining the result, and flags for disposable addresses, role-based emails, catch-all domains, and more.
Yes! We offer direct integrations with Mailchimp, HubSpot, Salesforce, Zapier, and more. Our REST API enables custom integrations with any platform in minutes.
Every bounced email costs money and damages your sender reputation. See the real impact of cleaning your list.
* Based on average ESP costs and reduced bounce-related penalties
Choose the solution that fits your workflow
Integrate real-time verification into your apps, CRMs, and workflows with our RESTful API.
Block invalid emails at the point of capture. Works with any HTML form, no coding required.