dovecot - Jan 2011 - Sharing user folders doesn't work when users have periods in names.

I am using period as an IMAP separator with Maildir directories and I 
cannot share folders where the user has a period in their name.

Suppose I log in as 'some.user' and do:
    SETACL INBOX mailtest at example.co.uk +lrwstipekxacd

/var/mail/virtual/users/some.user/Maildir/dovecot-acl is created, with 
appropriate contents and shared-mailboxes.db gains an entry for 
'shared/shared-boxes/user/mailtest at example.co.uk/some.user at
example.co.uk'.
mailtest is simply unable to see a new folder.

As mailtest 'a LIST "" "Users.*" ' is empty. If I do
' a MYRIGHTS
Users.some.user.INBOX ' I get 'NO [NONEXISTENT] Mailbox doesn't
exist:
Users.some.user.INBOX' and, oddly, a new maildir appears: '* LIST 
(\Noselect \HasChildren) "." "Users.some" ' -- it also
creates an empty
folder structure with a single file 
/var/mail/virtual/users/some/Maildir/dovecot-acl-list too!

Is there a workaround that does not involve rebuilding every user's 
Maildir with backslash as a separator?

Thanks,

Ian

On Mon, 2011-01-03 at 15:48 +0000, ian+dovecot at comtek.co.uk wrote:
> As mailtest 'a LIST "" "Users.*" ' is empty. If
I do ' a MYRIGHTS
> Users.some.user.INBOX ' I get 'NO [NONEXISTENT] Mailbox doesn't
exist:
> Users.some.user.INBOX' and, oddly, a new maildir appears: '* LIST 
> (\Noselect \HasChildren) "." "Users.some" ' -- it
also creates an empty
> folder structure with a single file 
> /var/mail/virtual/users/some/Maildir/dovecot-acl-list too!
> 
> Is there a workaround that does not involve rebuilding every user's 
> Maildir with backslash as a separator?
You don't need to rebuild anything on Dovecot's side to change
separator. Just change it. Clients may become confused about that
though.

The only other possibility would be to change '.' in usernames to
something else. Maybe auth_username_translation could help there.

In any case having '.' both in usernames and as hierarchy separator just
isn't going to work.

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On 04/01/2011 09:30, Timo Sirainen wrote:
> On Mon, 2011-01-03 at 15:48 +0000, ian+dovecot at comtek.co.uk wrote:
>> As mailtest 'a LIST "" "Users.*" ' is
empty. If I do ' a MYRIGHTS
>> Users.some.user.INBOX ' I get 'NO [NONEXISTENT] Mailbox
doesn't exist:
>> Users.some.user.INBOX' and, oddly, a new maildir appears: '*
LIST
>> (\Noselect \HasChildren) "." "Users.some" ' --
it also creates an empty
>> folder structure with a single file
>> /var/mail/virtual/users/some/Maildir/dovecot-acl-list too!
>>
>> Is there a workaround that does not involve rebuilding every user's
>> Maildir with backslash as a separator?
> You don't need to rebuild anything on Dovecot's side to change
> separator. Just change it. Clients may become confused about that
> though.
>
> The only other possibility would be to change '.' in usernames to
> something else. Maybe auth_username_translation could help there.
>
> In any case having '.' both in usernames and as hierarchy separator
just
> isn't going to work.
Ah, I understand, thanks.

Has anybody got any tips on migrating IMAP separators? Ideally I'd be 
able to migrate users incrementally. Is there a way to specify the 
separator per-user? I can't see a way to do it with a postlogin script 
or userdb.

http://wiki2.dovecot.org/UserDatabase/ExtraFields shows a namespace 
setting, but it seems that the namespace is in version 1.2 format and my 
namespaces look like:

namespace {
    type = private
    separator = .
    prefix     inbox = yes
}
namespace {
    type = shared
    separator = .
    prefix = Users.%%n.
    location = 
maildir:/var/mail/virtual/users/%%n/Maildir/:INDEX=~/shared/%%u
    subscriptions = no
    list = children
}
namespace {
    type = public
    separator = .
    prefix = Shared.
    location = maildir:/var/mail/virtual/public:INDEX=~/public
    subscriptions = no
}

Thanks,

Ian

-- 
======================================================================Ian
Crowther           Tel: +44 845 4501626  Unit 108, 10th Avenue,
IT Dept, Comtek        Fax: +44 845 4501627  Zone 3, Deeside Industrial
Network Systems UK Ltd                       Park, CH5 2UA, Flintshire
=======================================================================