btsu.edu.pl is a disposable email domain

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

Raw API JSON response:

{
    "valid": false,
    "block": true,
    "domain": "btsu.edu.pl",
    "base_domain": "btsu.edu.pl",
    "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": false,
    "is_parked": false,
    "is_role_based_email": false,
    "mx_host": "btsu.edu.pl",
    "mx_ip": "104.21.9.162",
    "mx_info": "No MX-pointer in DNS record. Using domain: btsu.edu.pl",
    "mx_fallback": true,
    "mx_hosts": [
        "btsu.edu.pl"
    ],
    "mx_ips": [
        "104.21.9.162"
    ],
    "mx_priorities": [],
    "email_provider": null,
    "disposable_provider": null,
    "possible_typo": [],
    "domain_age_days": 419,
    "domain_created_at": "2025-07-17T00:00:00+00:00",
    "block_status_changed_at": "2024-06-18T07:39:34+00:00"
}