Is guu.gy valid?
How to block guu.gy invalid e-mail domain
guu.gy
guu.gy 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.
The best way to detect and block invalid email domains like guu.gy is to use the Check-Mail API, available for free, for all programming languages.
Raw API JSON response:
"valid": false,
"block": true,
"disposable": false,
"email_forwarder": false,
"domain": "guu.gy",
"text": "Invalid domain.",
"reason": "Unable to get domain or MX pointer.",
"risk": 45,
"mx_host": "guu.gy",
"possible_typo": [],
"mx_ip": null,
"mx_info": "No MX-pointer in DNS record. Using domain: guu.gy",
"last_changed_at": "2025-09-18T07:42:18+02:00"
}
guu.gy
Status: Invalid domain.
RISK
MEDIUM
Domain risk: 45
Are you a programmer?
Did you know we have a free API to validate e-mails and block guu.gy?