GAFE groups and restrict delivery

[ticker]

I have restricted our student users form sending and receiving emails from outside our domain. They are in their own OU with each having a Restrict Delivery rule set up just for them. Emails between all internal users are working fine (including the OU's with the Restrict Delivery rule). Group emails do not deliver to the OU's with the Restrict Delivery rule; group emails work to all other OU's that do NOT have a Restrict Delivery rule like the support and teaching staff OU's. When I disable the Restrict Delivery restriction, the group emails will go through to the group that previously had the Restrict Delivery rule. Any one else had this issue and how did you resolve it, i am hoping i don't have to turn off restrict delivery for the students.

I have looked on the various Google forums etc but despite it being an issue no one has a answer or resolution.

Edited November 6, 2015 by ticker