catcat.uk is a disposable email domain

catcat.uk is a disposable temp email domain from kuku.lu that provides throwaway email addresses and should be blocked. These temporary addresses are frequently exploited to bypass verification systems and create fake accounts.

Raw API JSON response:

{
    "valid": true,
    "block": true,
    "domain": "catcat.uk",
    "base_domain": "catcat.uk",
    "text": "Disposable email provider",
    "reason": "Heuristics: BP3",
    "risk": 90,
    "is_disposable": true,
    "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": false,
    "is_role_based_email": false,
    "mx_host": "recv22.erinn.biz",
    "mx_ip": "160.251.78.178",
    "mx_info": "Using MX pointer recv22.erinn.biz from DNS with priority: 10",
    "mx_fallback": false,
    "mx_hosts": [
        "recv22.erinn.biz"
    ],
    "mx_ips": [
        "160.251.78.178"
    ],
    "mx_priorities": {
        "recv22.erinn.biz": 10
    },
    "email_provider": null,
    "disposable_provider": "kuku.lu",
    "possible_typo": [],
    "domain_age_days": null,
    "domain_created_at": null,
    "block_status_changed_at": "2026-07-18T08:52:23+00:00"
}