[Dovecot] newbie question about shared folders

[Tom Lieuallen]

I'm preparing to move our site to dovecot 1.2.11 and have a question 
about shared folders.  We're currently using UW imap's mbx mailboxes for 
shared folders.  We accomplish the sharing by use of file system 
permissions and ACLs.

I notice that dovecot's method of sharing is more based on IMAP ACLs and 
apparently file system permissions are useful, but not necessary.

On the main dovecot page, it says:  "Dovecot allows mailboxes and their 
indexes to be modified by multiple computers at the same time..."

So, my question is whether I need to use the dovecot imap sharing 
namespace in order to safely share imap folders, or whether I can just 
use file system permissions as we have been using?  My biggest concern 
is safe concurrent access to the shared folders, which I'm planning to 
implent with mbox files for now.

thank you

Tom Lieuallen
Oregon State University
College of Engineering