The Problem With Form Submissions
Bad emails slip through every day. Here's the cost.
Typos & Mistakes
A mistyped domain locks users out of their account.
Disposable Emails
Throwaway emails grab free trials, then vanish.
Fake Submissions
Bots flood forms with junk that pollutes your database.
Lost Customers
Unreachable inboxes can't confirm or complete a purchase.
Validate Before They Submit
The widget validates emails as users type. Invalid ones never 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 at the source
Keep Your List Clean
Stop invalid emails at the source, every time.
Block Bad Actors
Catch disposable, temporary, and role-based emails.
Improve Deliverability
Better open rates and fewer bounces.
Protect Your Domain
Avoid ISP blacklists and reputation damage.
Save Money
Never pay to send to addresses that don't exist.
Fully Customizable
Match rules, styling, and messages to your brand.
Install In Under A Minute
- 1Add the script
Drop our lightweight JavaScript file in your page header, or deploy it via Google Tag Manager.
- 2Initialize the widget
Pass your public team ID, specify your form, and map the email input. Done.
<!-- 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
The widget detects input as they type.
Instant Verification
Validated live with 27+ checks.
Visual Feedback
Green for valid, red for invalid.
Form Control
Invalid emails block submission.
Perfect For Every Form
Wherever you collect emails
Sign-Up Forms
Valid emails for verification and recovery.
Newsletter Signups
A clean subscriber list from day one.
E-Commerce Checkout
Make sure order confirmations land.
Lead Generation
Capture leads with reachable contacts.
Contact Forms
Replies that actually get through.
Course Enrollments
Deliver certificates to real inboxes.
Frequently Asked Questions
The SendSure widget, explained
No. The script is 8kb gzipped and loads asynchronously, so it won't affect page load or Core Web Vitals.