Authentication Failed for Mail (Snappymail)


I installed Cyperpanel with a hostname, for example domaindotcom. After the installation process was complete, I saw that domaindotcom had been added automatically. The problem is that when I create an email for domaindotcom, I don’t log in. The information that appears is “Server message failed authentication: AUTHENTICATIONFAILED Authentication failed”. In fact, when I create an email for another domain, it works. Is there a solution to the problem?

Thank You.