(1) Is the password valid?
You can check if your account is correct by using http://tmail.tmu.edu.tw.
As long as you can login normally, it means your password is correct. (You can try as many times as you like).
(2) If you feel your password is not secure and you want to change it yourself, you can visit the following website:
(3)What if I really forget my password?
You can only reset your password, but you cannot check your old password! If you have lost your password and want to reset it, you can use SMS to change your password. If you can't receive SMS, please follow the instructions on the webpage (Lost Password Change System) to fill out the application form and attach two certificates to do so.