In the sample page, the enhanced-list
mailbox community is set as Community 10. A special subscriber
community, Community 9, is administered to send to all communities
(except the shadow mailbox community). Only subscribers you would
like to have access to the enhanced lists are placed into Community
9. The shadow mailbox community ID is set as Community 11. The
shadow mailbox community ID in the sample is administered so that
messages can be sent to any community, but messages cannot be
received from any other community. Note the check in sender community
1 and recipient community 10; it represents restricting users
in the default community (1) from using the enhanced-lists.
