Is ad.ryukoku.ac.jp valid?

ad.ryukoku.ac.jp is a valid domain that should be allowed to do sign-ups and registrations. Based on our analysis, you should allow this domain.

Raw API JSON response:

{
    "valid": true,
    "block": false,
    "domain": "ad.ryukoku.ac.jp",
    "base_domain": "ryukoku.ac.jp",
    "text": "Looks okay",
    "reason": "Heuristics: WM1",
    "risk": 10,
    "is_disposable": false,
    "is_email_forwarder": false,
    "is_public_free": false,
    "is_public_premium": false,
    "is_business_provider": true,
    "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": "ad-ryukoku-ac-jp.mail.protection.outlook.com",
    "mx_ip": "52.101.157.40",
    "mx_info": "Using MX pointer ad-ryukoku-ac-jp.mail.protection.outlook.com from DNS with priority: 10",
    "mx_fallback": false,
    "mx_hosts": [
        "ad-ryukoku-ac-jp.mail.protection.outlook.com"
    ],
    "mx_ips": [
        "52.101.157.40"
    ],
    "mx_priorities": {
        "ad-ryukoku-ac-jp.mail.protection.outlook.com": 10
    },
    "email_provider": "Exchange Online",
    "disposable_provider": null,
    "possible_typo": [],
    "domain_age_days": null,
    "domain_created_at": null,
    "block_status_changed_at": "2020-10-02T02:09:13+00:00"
}