Email Blacklist API

Protect your signup forms from disposable emails. Our API checks against 186,000+ known temporary email domains, updated daily from 5 open-source data sources.

Start for Free
Try it now - no signup required:
curl "https://domscan.net/v1/email/check?email=user@10minutemail.com"

Example Response

{
  "email": "user@10minutemail.com",
  "domain": "10minutemail.com",
  "local_part": "user",
  "valid_syntax": true,
  "checks": {
    "disposable": { "is_disposable": true, "confidence": "high" },
    "role": { "is_role": false, "role_type": null },
    "free": { "is_free": false, "provider": null },
    "mx": { "has_mx": true, "records": ["mx1.10minutemail.com"] },
    "dnsbl": { "listed": false, "threat_level": "none" }
  },
  "risk_score": 80,
  "risk_level": "high",
  "flags": ["DISPOSABLE_DOMAIN"]
}

Key Features

186K+ Disposable Domains

Comprehensive database aggregated from 5 open-source repositories, updated daily.

Confidence Scoring

High, medium, and low confidence levels based on cross-source verification.

Role-Based Detection

Identify admin@, support@, info@ and other role-based addresses.

Free Provider Detection

Flag Gmail, Yahoo, Outlook, and other free email providers.

MX Record Validation

Verify the domain can actually receive email.

DNSBL Check

Check domain against Spamhaus, SURBL, and URIBL blacklists.

Risk Scoring

Aggregate risk score 0-100 with low/medium/high classification.

Bulk API

Check up to 100 emails in a single API request with summary stats.

Frequently Asked Questions

What is a disposable email?

Disposable emails (also called temporary, burner, or throwaway emails) are addresses that self-destruct after a short time. Services like 10minutemail, guerrillamail, and tempmail are commonly used to bypass signup verification.

Why should I block disposable emails?

Users with disposable emails have near-zero engagement and often abuse your service. Blocking them improves signup quality, reduces fake accounts, and saves costs on email sending.

How often is the blacklist updated?

Our database updates daily. Access the full list via GET /v1/email/blacklist.

Can I access the full blacklist?

Yes! Use GET /v1/email/blacklist to get the paginated feed with up to 10,000 domains per request. Include offset and limit parameters to page through the full list.

What is the risk score based on?

Disposable domain (+80), no MX records (+50), DNSBL listed (+60), role-based address (+20), free provider (+10). Scores are capped at 100 and classified as low (0-39), medium (40-69), or high (70-100).

Start Blocking Disposable Emails

Start for free with 10,000 credits per month. Start checking domains in seconds.

View Full API Documentation