Free tool · open-source lists
Disposable email checker
Find out whether an address belongs to a temporary email service or a free webmail provider, and whether its domain can receive email at all.
Compared with 9,189 known disposable and 4,462 free email domains, plus a live MX lookup.
Why detect disposable addresses?
- Free-trial abuse: one person, many trials.
- Fake accounts and spam in communities and marketplaces.
- Wasted sends: the inbox expires, so your onboarding emails bounce or go unread, and bounces hurt your sender reputation.
- Polluted metrics: sign-ups that will never convert.
Disposable vs. free email
Free providers (Gmail, Outlook.com, Yahoo) give people permanent personal addresses: these are real customers. Disposable services give temporary ones. Block disposable addresses; for B2B forms you may additionally ask for a work address instead of a free one.
Frequently asked questions
What is a disposable email address?
How do I block disposable emails in my sign-up form?
Where does the list come from?
Email validation API
Validate emails in your app
emailvalidation.io checks syntax, MX records and the mailbox over SMTP, flags disposable, role and free addresses and returns a quality score, in one request.
Read the docs100 free validations every month. No credit card required.
GET https://api.emailvalidation.io/v1/info?email=test@mailinator.com
{
"email": "support@emailvalidation.io",
"domain": "emailvalidation.io",
"format_valid": true,
"mx_found": true,
"smtp_check": true,
"disposable": false,
"role": true,
"free": false,
"score": 0.64,
"state": "deliverable",
"reason": "valid_mailbox"
}