Go to your webmail by yourdomain.com/webmail or webmail.yourdomain.com, key in your full email address and password

Click your email address on right hand top, then Password & Security

Set you new email password that meets Password Complexity Requirements:
– At least 8 alphanumeric characters with a mix of capital letters, numbers and symbols.
– Should not be equivalent to the email username.
– Do not use the previous password.
– Do not use the similar password for email accounts.