Is This Email Domain Disposable?

Check Any Domain

Want to check if a domain is disposable? Use our free checker tool — it queries EmailProbe's open API in real time and tells you whether the domain belongs to a disposable email service or a legitimate provider.

Popular Domains People Check

Every day, thousands of people search Google to find out whether a specific email domain is disposable. Here are the most commonly asked-about domains and their actual status.

Notice the pattern: the four legitimate providers (Gmail, Outlook, Hotmail, Yahoo) are all free email services, not disposable ones. "Free" and "disposable" are different things. A free email provider gives you a permanent inbox tied to your identity. A disposable service gives you a temporary address that self-destructs.

How We Detect Disposable Domains

EmailProbe does not rely on a single method. The detection engine combines multiple signals on every domain it checks:

• Domain blocklist lookup. We maintain a database of 202,686+ confirmed disposable domains, synced from nine open-source lists plus two proprietary lists. This handles the majority of disposable emails on the first check.
• MX infrastructure fingerprinting. Even when a domain isn't on any list, its MX (mail exchange) records can give it away. We match MX hostnames against a curated set of known disposable mail infrastructure.
• IP cluster analysis. We resolve MX records to IP addresses and check them against infrastructure fingerprints we track for disposable email services. Operators who spin up new domains often reuse the same servers.
• Heuristic scoring. For completely unknown domains, we apply pattern-based signals including domain structure, TLD risk, and keyword analysis. This produces a risk score from 0 to 100.

The blocklist updates every 15 minutes, and infrastructure data is continuously refreshed. New disposable services rarely survive more than a few hours before they're flagged.

Why People Search for This

There are three common situations that drive someone to check whether a domain is disposable.

Cleaning signup forms

If you run a SaaS product, you've seen the pattern: a spike in new signups that never activate, never open an onboarding email, and never convert. Disposable emails are the usual cause. Blocking them at signup keeps your user database clean and your activation metrics honest.

Maintaining email lists

Email marketers who purchase or import lists often inherit addresses from disposable domains. Sending to these addresses produces hard bounces, which damage your sender reputation with Gmail, Outlook, and other inbox providers. Checking domains before adding them to your list prevents deliverability problems downstream.

Account security

Password reset flows, two-factor authentication, and account recovery all depend on the user having access to a real inbox. If someone registers with a disposable email, those security mechanisms break. Verifying domain legitimacy at registration closes this gap.

Use the API Programmatically

The domain checker above uses EmailProbe's free open API. You can call it directly from your own code. No API key required, no signup needed. The endpoint supports CORS, so it works from both server-side and client-side code.

const domain = 'mailinator.com';

const res = await fetch(
  `https://api.emailprobe.dev/open/v1/disposable/${domain}`
);
const data = await res.json();

if (data.disposable) {
  console.log(`${domain} is disposable`);
} else {
  console.log(`${domain} is legitimate`);
}

curl https://api.emailprobe.dev/open/v1/disposable/mailinator.com

The open API returns a JSON response with a disposable boolean and the domain name. It's rate-limited to 10 requests per day per IP, which is enough for manual lookups and quick tests. For higher volume, grab a free API key to get 2,500 authenticated requests per month with full validation (MX analysis, risk scoring, local part analysis).

{
  "domain": "mailinator.com",
  "disposable": true
}

Frequently Asked Questions