Mdaemon Default Admin Password ((top)) Direct

Don't use "admin@yourdomain.com." Using a unique name makes it harder for brute-force attacks to guess the username. Restrict IP Access: MDaemon Security Settings

If you are locked out, it is because the password set during installation or a subsequent modification has been forgotten, rather than a master default password being active. How Admin Accounts Are Created mdaemon default admin password

If you are using SecurityGateway alongside MDaemon, a password reset tool exists. The procedure involves: Don't use "admin@yourdomain