Is devnull.facebook.com valid?
How to block devnull.facebook.com e-mail domain
devnull.facebook.com
devnull.facebook.com is a domain that should be blocked from sign-ups or registrations. Based on our analysis, you should block this domain. If a user is trying to sign-up using an e-mail on this domain, it's likely that it's a malicious or fraudulent attempt for some reason.
The best way to detect and block domains like devnull.facebook.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": false,
"domain": "devnull.facebook.com",
"text": "Should be blocked",
"reason": "Blacklisted",
"risk": 65,
"mx_host": "smtpin.vvv.facebook.com",
"possible_typo": [],
"mx_ip": "66.220.149.251",
"mx_info": "Using MX pointer smtpin.vvv.facebook.com from DNS with priority: 10",
"last_changed_at": "2020-12-13T21:17:36+01:00"
}
devnull.facebook.com
Status: Should be blocked
RISK
MEDIUM
Domain risk: 65
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