Verify email addresses before you send. Reduce bounces, protect your sender reputation, and increase deliverability with our powerful verification API and bulk validation tools.
Trusted by developers and marketers worldwide
Whether you need bulk verification, real-time API, or no-code integrations, we've got you covered.
Upload your email list and get a clean, verified file back in minutes. Perfect for cleaning existing databases.
Verify emails at the point of capture with our lightning-fast API. Integrate in minutes with any application.
Add email verification to your signup forms with a simple script tag. No coding required.
Our 18-stage verification engine catches what others miss.
Connects to mail servers to verify mailbox existence without sending emails.
RFC-compliant syntax checking ensures proper email format.
Verifies domain exists and is configured to receive email.
Validates email authentication records for improved deliverability insights.
Identifies known spam traps and honeypots to protect your sender reputation.
Identifies temporary email addresses from 5,000+ disposable providers.
Identifies catch-all servers that accept all emails but may not deliver.
Flags role-based addresses like info@, admin@, support@.
Machine learning-powered quality score from 0-100 for every email.
Identifies free email providers like Gmail, Yahoo, Outlook.
Extracts first and last name from email addresses automatically.
Detects and suggests fixes for common domain typos (gmial.com → gmail.com).
Identifies SMTP provider (Google Workspace, Microsoft 365, etc.).
Identifies emails with tags (user+newsletter@domain.com).
Advanced retry logic handles temporary rejections for accurate results.
Automatically removes duplicate emails from your list.
Identifies unmonitored mailboxes (noreply@, notifications@).
Detects when a mailbox is over quota and cannot receive mail.
Quickly build production-ready integrations with modern tools and simple documentation. Our API is easy to use and quick to set up.
const SendSure = require('sendsure');
const client = new SendSure('YOUR_API_KEY');
// Verify a single email
const result = await client.verify('user@example.com');
console.log(result.status); // 'valid'
console.log(result.score); // 95
console.log(result.flags); // ['has_mx', 'has_spf']Validate Emails in Bulk
Improve email deliverability and start maintaining a healthier mailing list with just a few clicks.
Block Invalid Emails
Stop invalid emails from reaching your database. Add real-time email validation to any HTML form by simply copying and pasting a few lines of code.
"SendSure reduced our bounce rate from 12% to under 1%. The verification is incredibly accurate, and the API was a breeze to integrate into our signup flow."
"We've tried several email verification services, and SendSure is by far the best. The speed is unmatched—we verified 500K emails in under 15 minutes."
"The disposable email detection saved us from thousands of fake signups. Our lead quality improved dramatically after implementing SendSure."
"Handles our 2M+ monthly verifications without breaking a sweat. The webhooks make async processing seamless for our enterprise workflows."
"As a developer, I appreciate the clean API documentation. Had our integration live in under an hour. Great DX."
"The cost savings from not sending to invalid emails paid for the subscription 10x over in the first month. Incredible ROI."
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