Sending information like this by standard email is not safe as it can be easily intercepted as it makes its way over the internet to the recipient.
Nid yw'n ddiogel i anfon gwybodaeth debyg i hyn dros e-bost safonol oherwydd gellir ei rhyng-gipio'n hawdd wrth i'r e-bost gael ei drosglwyddo dros y Rhyngrwyd at y derbynnydd.