token520.cyou is a disposable email domain

token520.cyou is a disposable temp email domain from duckmail.sbs 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": "token520.cyou",
    "base_domain": "token520.cyou",
    "text": "Disposable \/ temporary domain",
    "reason": "Heuristics x1",
    "risk": 100,
    "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": null,
    "is_role_based_email": false,
    "mx_host": "mail.duckmail.sbs",
    "mx_ip": "38.45.67.112",
    "mx_info": "Using MX pointer mail.duckmail.sbs from DNS with priority: 10",
    "mx_fallback": false,
    "mx_hosts": [
        "mail.duckmail.sbs"
    ],
    "mx_ips": [
        "38.45.67.112"
    ],
    "mx_priorities": {
        "mail.duckmail.sbs": 10
    },
    "email_provider": null,
    "disposable_provider": "duckmail.sbs",
    "possible_typo": [],
    "domain_age_days": 149,
    "domain_created_at": "2026-05-13T00:00:00+00:00",
    "block_status_changed_at": "2026-10-08T18:25:41+00:00"
}