The Problem with Form Submissions
Bad emails slip through your forms every day. Here's what that costs you.
Typos & Mistakes
Users mistype "gmal.com" or "yahooo.com" and lose access to their accounts.
Disposable Emails
Users sign up with throwaway emails to exploit free trials, then never return.
Fake Submissions
Bots and bad actors fill your forms with junk emails that pollute your database.
Lost Customers
People who can't receive your emails can't complete purchases or verify accounts.
Validate Before They Submit
SendSure's widget validates emails in real-time as users type. Invalid emails are blocked before they ever reach your server.
- Instant validation as users type
- Clear error messages for invalid emails
- Blocks form submission automatically
- Works with any HTML form
Create Account
See how validation protects different form types
Benefits of Validation at Capture
Stop bad data before it enters your system
Keep Your List Clean
Good list hygiene starts at the source. Never let an invalid email into your database.
Block Bad Actors
Detect and block disposable, temporary, and role-based emails that signal fraud or abuse.
Improve Deliverability
Higher-quality lists = better open rates, fewer bounces, stronger sender reputation.
Protect Your Domain
Avoid being blacklisted by ISPs. Clean lists protect your sender reputation.
Save Money
Don't pay your email provider to send to addresses that don't exist.
Fully Customizable
Configure validation rules, styling, and messages to match your brand.
Install in Under a Minute
- 1Add the script
Include our lightweight JavaScript file in your page header. You can also deploy this easily via Google Tag Manager (GTM).
- 2Initialize the widget
Initialize SendSure with your public team ID, specify your form, and map the email input. That's it!
<!-- Step 1: Add the script (Or use GTM) -->
<script src="https://app.sendsure.ai/widget.js"></script>
<!-- Step 2: Initialize on your form -->
<script>
SendSure.init({
teamId: "tm_abc123",
formSelector: "#signup-form",
emailInputSelector: "input[type='email']",
options: {
blockDisposable: true,
blockRoleBased: false
}
});
</script>How It Works
Real-time validation in four simple steps
User Types Email
As the user enters their email, the widget detects input changes.
Instant Verification
SendSure validates the email in real-time using 27+ verification checks.
Visual Feedback
The user sees immediate feedback—green for valid, red for invalid.
Form Control
Invalid emails block submission. Only clean data reaches your server.
Perfect for Every Form
Wherever you collect emails, SendSure can validate them
Sign Up Forms
Ensure new accounts have valid emails for verification and password recovery.
Newsletter Signups
Build a clean subscriber list from day one with validated addresses.
E-commerce Checkout
Validate customer emails before purchase to ensure order confirmations.
Lead Generation
Capture quality leads with valid contact information for your sales team.
Contact Forms
Ensure customer inquiries come from reachable email addresses.
Course Enrollments
Verify student emails for online courses to deliver certificates.
Frequently Asked Questions
Common questions about the SendSure Widget
Not at all. The widget script is only 8kb gzipped and loads asynchronously. It won't affect your page load time or Core Web Vitals scores.