Sometimes teachers and students have issues with email on their iPads. This is the handy workaround from Matt
Sending and receiving emails to large groups of people instead of the specific groups you need can be frustrating. In order to make it easy for you to send your emails directly to the people required this post explains how to set up your own dedicated email group or groups to make it much easier in future to target certain key people.
Welcome to TeacherTec,
The best collection of resources for using technology in your classroom!