If you did the installation yourself (FTPed the files up, created the database, and created the username/password), then you did enter a username and password for the admin account. If you used some third party installer then I have no idea what they might have set it to. You would want to contact the installer company to ask them what it is.You could try forwarding the "blank" email to another email address and see if its just your client not displaying it properly.You can try to follow this: http://www.tmib.net/content/recover-reset-admin-account-passowrd-osticketAlthough I have not tried it on the current versions (1.9.x) so ...