Is ktkf.com valid?

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

ktkf.com

ktkf.com 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": "ktkf.com",
    "base_domain": "ktkf.com",
    "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": "ktkf.com",
    "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": 7974,
    "domain_created_at": "2004-12-12T00:00:00+00:00",
    "block_status_changed_at": "2026-09-03T04:42:38+00:00"
}
ktkf.com should be blocked
ktkf.com

Status: Domain does not accept email

RISK
MEDIUM

Domain risk: 55

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Technical Details for ktkf.com

Risk Score

55 / 100

MX Host

ktkf.com

Last updated: Sep 3, 2026

ktkf.com Domain Age

ktkf.com was registered on December 12, 2004 and is 21 years, 10 months old.

How to Block ktkf.com

You can automatically block ktkf.com 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=ktkf.com"

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

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