Is mark099.osdmail.com valid?

mark099.osdmail.com

mark099.osdmail.com is an e-mail forwarding domain. Domains that do email forwarding allows individuals to create email aliases so they don't have to reveal their real email. These alias emails can be useful for one-time registrations or avoiding spam, but they're frequently used by spammers and malicious users who want to bypass verification systems and create fake accounts.

The best way to detect and block email forwarding domains like mark099.osdmail.com is to use the Check-Mail API, available for free, for all programming languages.

Raw API JSON response:

{
    "valid": true,
    "block": true,
    "disposable": false,
    "email_forwarder": true,
    "domain": "mark099.osdmail.com",
    "text": "Highly suspicious",
    "reason": "Anomalies detected",
    "risk": 100,
    "mx_host": "route3.mx.cloudflare.net",
    "possible_typo": [],
    "mx_ip": "162.159.205.23",
    "mx_info": "Using MX pointer route1.mx.cloudflare.net from DNS with priority: 10",
    "last_changed_at": "2026-03-08T05:00:49+00:00"
}