Disposable Email Address Checker
Instantly check whether an email address is disposable, temporary, or fake. Paste an address or a domain and find out if it belongs to a known throwaway provider — before it hits your signup form.
Check an email or domain
Enter a full address ([email protected]) or just a domain (tempmail.com).
What is a disposable email address?
A disposable email address (also called a temporary, throwaway, or burner email) is an inbox created to last minutes or hours instead of years. Services like Mailinator, Temp-Mail, Guerrilla Mail and 10 Minute Mail generate them on demand so people can receive a confirmation link without handing over their real address. Once the address expires, anything sent to it is gone.
That is fine for a one-off signup, but it is a problem when your product is on the receiving end. A user who signs up with a throwaway address will never see your emails, will not convert, and inflates every number you measure. This free disposable email checker tells you, in real time, whether an address belongs to one of these providers.
How the disposable email checker works
The tool takes the domain from whatever you enter — a full address or a bare domain — and matches it against a continuously updated database of 409,000+ known disposable and temporary email providers. If the domain is on the list, the result is Disposable. If it is a normal mailbox provider (Gmail, Outlook, your company domain), the result is Legitimate. No message is ever sent to the address.
1 · Paste it
Enter an email address or just its domain and press Check.
2 · We match the domain
The domain is checked against 409,000+ throwaway providers instantly.
3 · Act on the result
Accept legitimate addresses; block or flag disposable ones.
Why block disposable emails?
Filtering throwaway addresses at the point of signup protects your product in several ways:
- Cleaner user list — no dead inboxes padding your database or your billing.
- Better deliverability — fewer bounces and spam traps keep your sender reputation healthy.
- Less abuse — throwaway addresses are the main way people farm free trials, referral bonuses and fake accounts.
- Accurate analytics — real signups, real activation rates, real numbers.
- Lower support load — fewer fake or abandoned accounts to moderate.
Disposable vs temporary vs fake email
People use these terms interchangeably, and for filtering purposes they lead to the same action, but they are slightly different:
- Disposable / temporary email — a real, working inbox from a throwaway provider that expires on its own. It can receive mail right now, but not for long.
- Fake email — an address that does not exist at all, or has invalid syntax. It will hard-bounce immediately.
This tool catches the first case (disposable domains). To also confirm that a real mailbox exists — syntax, MX records, SPF, DMARC and a live mailbox check — run the address through the Email Validator.
Who uses this tool
Developers
Block throwaway domains at signup with one field — or the API.
Marketers
Keep disposable addresses out of your list before they bounce.
Founders
Stop free-trial abuse and keep activation metrics honest.
Frequently asked questions
What is a disposable email address?
A temporary, throwaway inbox created to receive mail for a short time. People use them to sign up for services without giving a real address; they expire quickly, so anything sent to them is often never read.
How does the disposable email checker work?
It extracts the domain from the address you enter and checks it against a continuously updated list of 409,000+ known disposable and temporary email providers. If the domain is on the list, the address is flagged as disposable.
Can I check just a domain instead of a full email?
Yes. Enter a full address like [email protected] or just the domain tempmail.com. The checker uses the domain either way.
Why should I block disposable email addresses?
They are commonly used for spam signups, fake accounts, abusing free trials, and skewing analytics. Blocking them keeps your user list clean and your sending reputation healthy.
Does a disposable result mean the email is invalid?
No. A disposable address can still technically receive mail right now — it just belongs to a throwaway provider, so it is likely temporary and low quality. To also confirm the mailbox exists, use the Email Validator.
Is there a limit on how many emails I can check?
No daily cap and no account needed for the web tool. For bulk checking or to run it inside your own signup flow, use the Corenexis Disposable Email API.
Do you store the addresses I check?
The address is used only to run the check. It is not attached to your session, not added to any list, and not sold.
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