xystem.biz.id is a disposable email domain

xystem.biz.id is a disposable temp email domain from fernn.email 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": "xystem.biz.id",
    "base_domain": "xystem.biz.id",
    "text": "Disposable \/ temporary domain",
    "reason": "Disposable",
    "risk": 91,
    "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": true,
    "is_parked": false,
    "is_role_based_email": false,
    "mx_host": "mail.xystem.biz.id",
    "mx_ip": "103.253.213.214",
    "mx_info": "Using MX pointer mail.xystem.biz.id from DNS with priority: 10",
    "mx_fallback": false,
    "mx_hosts": [
        "mail.xystem.biz.id"
    ],
    "mx_ips": [
        "103.253.213.214"
    ],
    "mx_priorities": {
        "mail.xystem.biz.id": 10
    },
    "email_provider": null,
    "disposable_provider": "fernn.email",
    "possible_typo": [],
    "domain_age_days": 81,
    "domain_created_at": "2026-06-26T00:00:00+00:00",
    "block_status_changed_at": "2026-09-11T13:18:23+00:00"
}