Is length.app valid?

length.app should be blocked (risk: 55/100). Use the Check-Mail API to detect risky domains.

length.app

length.app is a domain that should be blocked from sign-ups or registrations. Based on our analysis, you should block this domain. If a user is trying to sign-up using an e-mail on this domain, it's likely that it's a malicious or fraudulent attempt.

Raw API JSON response:

{
    "valid": true,
    "block": true,
    "domain": "length.app",
    "base_domain": "length.app",
    "text": "Domain does not accept email",
    "reason": "null_mx",
    "risk": 55,
    "is_disposable": false,
    "is_email_forwarder": false,
    "is_public_free": false,
    "is_public_premium": false,
    "is_business_provider": false,
    "is_isp_email": false,
    "is_email_api": false,
    "is_web_hosting_email": false,
    "is_self_hosted": false,
    "is_parked": true,
    "is_role_based_email": false,
    "mx_host": "length.app",
    "mx_ip": "76.223.54.146",
    "mx_info": "Domain declares it accepts no mail (RFC 7505 null MX).",
    "mx_fallback": false,
    "mx_hosts": [],
    "mx_ips": [],
    "mx_priorities": [],
    "email_provider": null,
    "disposable_provider": null,
    "possible_typo": [],
    "domain_age_days": 3082,
    "domain_created_at": "2018-05-08T00:00:00+00:00",
    "block_status_changed_at": "2026-08-10T18:15:43+00:00"
}
length.app should be blocked
length.app

Status: Domain does not accept email

RISK
MEDIUM

Domain risk: 55

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Technical Details for length.app

Risk Score

55 / 100

MX Host

length.app

Last updated: Aug 10, 2026

length.app Domain Age

length.app was registered on May 8, 2018 and is 8 years, 5 months old.

How to Block length.app

You can automatically block length.app and thousands of other disposable and fraudulent email domains using the free Check-Mail API. Simply query the API with any email domain to get an instant block recommendation.

Example API request:

curl -X POST "https://api.check-mail.org/v2/" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d "domain=length.app"

Get your free API key or read the documentation for integration guides in PHP, Python, JavaScript, and more.

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