Topic: What's new in iRedMail: Mailbox sharing.
iRedMail-0.7.0 will have mailbox sharing enabled by default. with this feature, you can share your mailbox folders to other users with specified permissions.
If you want to give it a try, follow this wiki article please:
http://www.iredmail.org/wiki/index.php? … MAP.Folder
The major problem is, we don't have a GUI to let user share their folders, hope roundcube will improve it.
Screenshot with Roundcube: