Is this a disposable email domain?
Check any domain against our list of temporary and throwaway providers — including the subdomains they spin up to stay ahead of blocklists.
Paste a domain or a full address — either works.
Why it matters
They never convert
A throwaway address exists to get past your signup form. Nobody reads what you send to it, so it inflates your list size and depresses every engagement metric you report on.
They wreck your deliverability
Many disposable domains expire and stop accepting mail entirely. Sending to them produces hard bounces, and mailbox providers read a rising bounce rate as a signal you buy lists.
They hide abuse
Free-trial cycling, fake reviews and referral fraud all run on throwaway addresses. Blocking them at signup is usually cheaper than detecting the abuse afterwards.
What a “not disposable” answer does not tell you
Only that the domain is not on our throwaway list. It says nothing about whether a specific mailbox at that domain exists — that needs a real SMTP check. New disposable services also appear constantly, so a clean answer here is a strong signal rather than a guarantee.
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How to tell if an email address is disposable
Disposable (temporary or burner) addresses are created in seconds and abandoned soon after. This is how the checker above spots them:
- Take the domain. Everything after the @ is what identifies the provider.
- Match it against known providers. Compare the domain with a list of temporary-email services that is refreshed continuously.
- Check related domains. Many services rotate through subdomains and look-alike domains to stay ahead of blocklists, so these are matched too.
- Decide. Block or flag the address at signup if the domain is disposable; otherwise verify the mailbox itself.
Frequently asked questions
What is a disposable email address?
An address from a temporary-email service that works for minutes or hours and then disappears. People use them to get past signup forms without giving a real address.
Why should I block disposable emails?
They inflate sign-up numbers with users you can never reach, are used to abuse free trials, and bounce once the inbox expires, which hurts your sender reputation.
Is a non-disposable domain always a real address?
No. It only means the domain is not a known throwaway provider. To know whether the mailbox exists, verify the full address with the free email checker.
Can I check disposable emails through an API?
Yes. The PickusMail email verification API flags disposable addresses in every result (isDisposable), alongside the full mailbox check.