Disposable / Temporary Email Domain Detection Regex for JavaScript

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching disposable / temporary email domain detection, ported and verified for JavaScript. Identity and credential patterns need both correctness and safety, since they're frequent targets for adversarial input. The snippet below is ready to drop into your JavaScript project — whether you're validating in an Express middleware, a Next.js API route, or a client-side form.

Javascript Implementation

// Disposable / Temporary Email Domain Detection
// ReDoS-safe | RegexVault — Identity & PII > Email Address

const disposableTemporaryEmailDomainDetectionRegex = /@(?:mailinator|guerrillamail|tempmail|throwam|yopmail|maildrop|sharklasers|guerrillamailblock|grr|spam4|trashmail|dispostable|spamgourmet|10minutemail|tempinbox|mailnull|spambog|getairmail|getnada|spam\.la|mailexpire)\.(?:com|net|org|me|io)$/i;

function validateDisposableTemporaryEmailDomainDetection(input: string): boolean {
  return disposableTemporaryEmailDomainDetectionRegex.test(input);
}

// Example
console.log(validateDisposableTemporaryEmailDomainDetection("test@mailinator.com")); // true

Test Cases

When to use this pattern

This pattern is drawn from the Identity & PII > Email Address category and carries a ReDoS-safe certification. That matters for JavaScript developers because especially critical in long-running Node.js event loops where a ReDoS vulnerability can block the entire process. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

This is a partial list — the disposable email ecosystem changes constantly. Use a maintained blocklist (e.g., disposable-email-domains GitHub repo) rather than a static regex. New domains appear regularly.