Please delete domain name "ukr.net" from database. Ukr.net - the largest postal service in Ukraine. This is a reliable service, for registration it needs a phone number. A lot of users from Ukraine use this email service. Check domain in open.kickbox.com (https://open.kickbox.com/v1/disposable/ukr.net) return result: "disposable:false".
Please delete domain name "ukr.net" from database. Ukr.net - the largest postal service in Ukraine. This is a reliable service, for registration it needs a phone number. A lot of users from Ukraine use this email service. Check domain in open.kickbox.com (https://open.kickbox.com/v1/disposable/ukr.net) return result: "disposable:false".