How to Designate a Moderator for a Mailing List Using Mailbox Sharing

In order to designate a moderator for a mailing list, basically you need to provide a user with Master access to the mailing list's special folders.

Let's take a look at the necessary steps to achieve this:

1. Make sure that the Groupware feature is enabled for the domain
2. Define a moderated list — before posting, each message must be approved by the moderator
3. Login via the WebMail interface using the postmaster account
4. Right click on the folder structure and select Open other user's folders and select the list's address as you would select a common user's address — the folder structure of the mailing list should now be available
5. Right click on the mailing list's top level folder and select Sharing
6. Select the user you wish to grant moderator rights and select Master as the Permissions level
7. Repeat step 6 for each user you wish to grant moderator rights to
8. Click Save & close

In order for the newly defined moderators to access the mailing list's folders and actually moderate the list, they must login via their own account and access the mailing list's folders as they would access all other users' shared folders. See here how to open another user's shared folders.

Note: The same result can be achieved by logging into the mailing list's special account and sharing each folder separately. In this way a more complex sharing and delegated administration of the mailing list can be achieved.