Gw802 here.

Some users with their mailbox sizes well over the limits have found a way
past the client's blocking of the send action when the mailbox exceeds the

Basically, they jusy proxy into a resource that they have write access to,
and then compose the email and before sending, click on the 'from' button
and select their own name.

Obviously, the check to ban sending is done when the 'new message' action is
taken, rather than the actual send. I was hoping this would be fixed when we
upgraded from 7 to 8 but alas it is not.

Is there a way to get this workaround blocked, such as removing the 'from'