Is fastmail.com valid?

fastmail.com 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": "fastmail.com",
    "base_domain": "fastmail.com",
    "text": "Looks okay",
    "reason": "Heuristics: WM1",
    "risk": 10,
    "is_disposable": false,
    "is_email_forwarder": false,
    "is_public_free": false,
    "is_public_premium": true,
    "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": "in1-smtp.messagingengine.com",
    "mx_ip": "103.168.172.216",
    "mx_info": "Using MX pointer in1-smtp.messagingengine.com from DNS with priority: 10",
    "mx_fallback": false,
    "mx_hosts": [
        "in1-smtp.messagingengine.com",
        "in2-smtp.messagingengine.com"
    ],
    "mx_ips": [
        "103.168.172.216",
        "103.168.172.218",
        "103.168.172.219",
        "103.168.172.220",
        "103.168.172.221",
        "103.168.172.217",
        "103.168.172.222",
        "103.168.172.223",
        "202.12.124.218",
        "202.12.124.217",
        "202.12.124.219",
        "202.12.124.216"
    ],
    "mx_priorities": {
        "in1-smtp.messagingengine.com": 10,
        "in2-smtp.messagingengine.com": 20
    },
    "email_provider": "Fastmail",
    "disposable_provider": null,
    "possible_typo": [],
    "domain_age_days": 11473,
    "domain_created_at": "1994-12-09T00:00:00+00:00",
    "block_status_changed_at": "2022-05-12T08:13:48+00:00"
}