Why Email Validation Matters for Your SaaS

CheckBoxHQ Team •
email validation saas best practices

The Problem with Invalid Emails

Every day, thousands of fake accounts are created using disposable email addresses, typos, or non-existent domains. These low-quality signups can:

  • Clog your onboarding queues
  • Skew your analytics
  • Waste marketing resources
  • Create security vulnerabilities

Benefits of Email Validation

Implementing robust email validation provides multiple benefits:

1. Higher Quality Leads

By filtering out disposable and temporary email addresses, you ensure that your marketing team works with real, engaged prospects.

2. Better Conversion Rates

Valid email addresses mean your welcome emails and onboarding sequences actually reach users, improving activation rates.

3. Reduced Fraud

Detecting disposable emails helps prevent abuse, multiple free trial signups, and other fraudulent activities.

4. Cleaner Database

Maintaining a clean email database improves deliverability and reduces bounce rates for your email campaigns.

How CheckBoxHQ Can Help

Our API provides four essential validation checks:

  • Disposable Email Detection: Identify temporary email services
  • MX Record Validation: Verify the domain can receive emails
  • A Record Verification: Ensure the domain exists
  • Public Provider Check: Flag free email services when needed

Getting Started

Integration is simple. With just a few lines of code, you can add comprehensive email validation to your signup forms:

const response = await fetch('https://api.checkboxhq.com/v1/validate/disposable', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ email: 'user@example.com' })
});

const result = await response.json();
if (result.is_disposable) {
  // Handle disposable email
}

Start protecting your forms today with CheckBoxHQ.

← Back to Blog