dovecot - Jul 2014 - ACLs on Top level mailboxes.

Hello,

I?m in the process of migrating a mail server to new hardware.   At the same
time, I?ve made the decision to switch from courier to dovecot (v2.2.13) and
from what I have seen so far I?m pretty happy.
I have two questions for the list.

I?d like my users mailboxes (Maildir format) to look like this:

Inbox
     UserCreatedSubFolder1
     UserCreatedSubFolder2
     ?
Sent
     UserCreatedSubFolder3
Drafts
Trash
Junk
Archives


The Top level folders (Sent, Drafts etc) are all ?Special? and I do not wish the
users to be able to delete them.
I also don?t want them to create new Top level folders.

This will force all custom folders to be under a Top Level folder.

The Maildir format currently looks like this:

~/Maildir/cur
~/Maildir/new
~/Maildir/tmp
~/Maildir/.INBOX/.UserCreatedSubFolder1/cur
~/Maildir/.INBOX/.UserCreatedSubFolder1/new
~/Maildir/.INBOX/.UserCreatedSubFolder1/tmp
~/Maildir/.Sent/cur
~/Maildir/.Sent/new
~/Maildir/.Sent/tmp

etc?.

I can get ACLs working with dovecot-acl files, and the permission I need (I
think is) ?owner lrwstipe?.

But if I put it into the ~/Maildir directory, then it applies to Inbox.
I?ve tried creating an .INBOX dir and putting it in there but that did not work.
I also tried some global-acl file settings but I could not make that work
either.

Basically, I?m wondering how to apply ACLs to the Top level and have different
ACLs for the actual inbox when using this scheme.
I?m not opposed to changing the Maildir format, but that would mean a lot of
work re-doing proemial scripts.

My second question relates to migration.    Is it enough that I copy the Maildir
structure and simply delete the courier files or is it a lot better to use a
courier->dovecot migration tool?
I realise folder subscriptions would be lost but that?s OK, I?ll recreate them
manually anyway.

Thanks for your time.

-Dan

On 24 Jul 2014, at 01:22, Dan Carroll <fbsd at dannysplace.net> wrote:
> I?m in the process of migrating a mail server to new hardware.   At the
same time, I?ve made the decision to switch from courier to dovecot (v2.2.13)
and from what I have seen so far I?m pretty happy.
> I have two questions for the list.
> 
> I?d like my users mailboxes (Maildir format) to look like this:
> 
> Inbox
>     UserCreatedSubFolder1
>     UserCreatedSubFolder2
>     ?
> Sent
>     UserCreatedSubFolder3
> Drafts
> Trash
> Junk
> Archives
> 
> 
> The Top level folders (Sent, Drafts etc) are all ?Special? and I do not
wish the users to be able to delete them.
> I also don?t want them to create new Top level folders.
> 
> This will force all custom folders to be under a Top Level folder.
..
> I also tried some global-acl file settings but I could not make that work
either.

I think global ACL file would work. Use something like:

* <no rename/delete rights>
INBOX.* <all rights>

(I don't remember the rights strings exactly now.)
> My second question relates to migration.    Is it enough that I copy the
Maildir structure and simply delete the courier files or is it a lot better to
use a courier->dovecot migration tool?
> I realise folder subscriptions would be lost but that?s OK, I?ll recreate
them manually anyway.
IMAP clients will redownload their local mail cache if you don't use
migration tool. Doesn't necessarily matter with few users.