When a Student RRU email account is first created, we automatically enable forwarding. This means that any email sent to your RRU email account is automatically forwarded to your personal email account on file before it gets to your mailbox.
If you stopped receiving email in your personal account, then you should check that forwarding was not turned off accidentally.
Are you concerned you are not receiving all your Moodle notifications? Please check this article on Moodle Forums.
This page goes into more detail about how email works for Students at RRU