[Dovecot] problematic ACL with shared folders and maildir

[Dominik L. Borkowski]

Hello,
Recently we have been asked to deploy some shared imap folders within our 
instance of dovecot. However, we ran into a problem with how ACLs are 
implemented, and consequences regarding maildir++ mailboxes.

Long story short:

* IMAP clients sees the hierarchy as a tree: sample/1, where 1 is a child of 
sample
* on the filesystem, sample/1 is represented as .sample and .sample.1, both on 
the same level

This presents a problem: dovecot-acl file meant for sample mailbox does not 
apply to mailbox 1. In fact, a user with permissions to create mailboxes 
under sample, will not be able to access those mailboxes, once created.

Wonder if anybody has been in a similar predicament, and found a solution. Any 
hints would be greatly appreciated.


PS) I'm also documenting this process, maybe others will find it useful:

https://collaboration.vbi.vt.edu/display/~dom/dovecot+-+shared+imap+folders

-- 
Dominik L. Borkowski - Senior Systems Administrator
Virginia Bioinformatics Institute - www.vbi.vt.edu