If you cannot connect to the server
mail.ukraine.com.ua), or sending or receiving mail does not work:
18.104.22.168- you should contact your internet service provider and report that you are seeing a problem with their DNS-server because it is old IP address our mail server (used several years ago).
993(used to receive mail).
465(used to send mail).
Thus, you can make sure that our mail server is working.