Be sure that your email client is not sending CGTrader notifications to a spam folder before you ever see it in your inbox! Not sure which email service you are using, but sometimes certain types of notifications can trigger false positive spam alerts in an email client system. So check your spam or trash folder, if possible, and be sure that is not the case. Chances are, notifications could have been falsely flagged by the email client as spam. If not, then contact support and let them know ASAP, because that could be hurting your reputation points if you aren't able to respond to requests in time.