| Class | MessageApproval | A held message. |
| Class | MailingList | The mailing list for a team. |
| Class | MailingListSet | No class docstring; 11/11 methods documented |
| Class | MailingListSubscription | A mailing list subscription. |
| Class | MessageApprovalSet | Sets of held messages. |
| Class | HeldMessageDetails | Details about a held message. |