There are three main mailing lists for RDO discussion:
Newsletter - email@example.com
A monthly update of what's going on at RDO. This list is read-only, and very low volume.
Users - firstname.lastname@example.org
The main discussion list if you are looking for help on the RDO project.
Developers - email@example.com
The main discussion list for RDO project contributors.
A complete list of mailing lists may be found at RDO Mailing-lists.
You may also want to be on one or more of the OpenStack mailing lists.