If the school has confirmed their username or school number in an email, then do not reply to the email, as their original message would be retained in the content.
Os bydd yr ysgol wedi cadarnhau ei enw defnyddiwr neu rif ysgol mewn e-bost, ni ddylid ateb yr e-bost gwreiddiol, gan y bydd y neges wreiddiol yn cael ei chynnwys yng nghynnwys yr e-bost.