I just configured a Postfix + Courier IMAP server for an internal support
queue with the intent that support@ email would be dumped into a common
IMAP folder for us to use. I've run into problems with the Maildir
permissions. I kludged around the delivery problem by adding a |chmod g+rw
Maildir/.Folder/new/ to the .forward which makes this happen (does anyone
have a better way of doing this?). The bigger problem I ran into was that
messages which are copied into the folder retain the default permissions
from their owner. Is there any way to have Courier adjust new messages so
they will get the permissions of the parent directory?
Not right now. Currently, shared folders are not designed to be delivered
to directly. Mail messages are moved into and out of shared folders via
IMAP or webmail, which sets up all the permissions correctly.