Help with custom mailing list

I am looking at how to create a Mailbox to handle this problem, as suggested. But everything still says beta feature when I go to Manage > Settings > Edit Troop Settings, Troop Track Settings tab, blue box.

I don’t want to mess things up with our troop by doing something risky.

Is the Mailbox feature currently reliable?

Just read here that this feature still has bugs.

Please let me know if this is an option to implement at this time. Thanks!