> On 02/03/2023 16:21 EET Julien Nadal <julien+dovecotnl at mujik.fr>
wrote:
>
>
> Hello;
> We were able to set up shared folders in a cluster (using dovecot as proxy
on dedicated front-end servers, without using director) by following
https://doc.dovecot.org/configuration_manual/shared_mailboxes/cluster_setup/.
>
> Here is our related conf on imap farms (dovecot v2.3.16 on Almalinux):
> namespaces:
> mail_location = maildir:~/Maildir
>
> namespace default {
> ? inbox = yes
> ? location =
> ? prefix =
> ? separator = /
> }
> namespace shared {
> ? list = children
> ? location = imapc:~/shared/%%u:INDEXPVT=~/shared-pvt/%%u
> ? prefix = shared/%%u/
> ? separator = /
> ? subscriptions = no
> ? type = shared
> }
>
>
> imapc settings:
>
> imapc_features = fetch-bodystructure fetch-headers rfc822.size search
modseq acl delay-login
> imapc_host = XXXXXX
> imapc_master_user = %{user}
> imapc_password = XXXXXX
> imapc_port = XXXXXX
> passdb {
> ? args = password=#hidden_use-P_to_show#
userdb_namespace/shared/disabled=yes userdb_acl_user=%{auth_user}
allow_nets=XXXXX/XX
> ? driver = static
> ? master = yes
> }
> dict {
> acl-mysql = mysql:/etc/dovecot/conf.d/dovecot-dict-sql.conf.ext
> }
>
>
> This way, a folder is created under ~/ : shared & shared-pvt :
>
> When user A shares a folder with B, B will find
~/shared/userA/sharedfolder
>
> I should mention that the user authentication (backend: mysql) uses the
full email address as we are in a multi-tenant context.
>
> So the folder looks like ~/shared/usera at domain.tld/folder
>
> Since then, everything works perfectly, we can share and see the shared
folders in the webmail (SOGo).
>
> Unfortunately, accessing these folders through an imap client (tested on
Thunderbird and MSOutlook) is impossible because the subscription fails (the
folder is listed, but the subscription doesn't seem to do anything).
> I could not find any relevant logs but I was able to confirm on the
command line: I am able to view folder with LIST, subscribe with an
"OK" output, but the folder is not listed with LSUB.
>
> So I could see that the subscribtion file in maildir shows incorrect
entries:
> V??? 2
> Sent
> Trash
> Drafts
> Junk
> shared/testuser1 at sub??? domain??? tld/INBOX/folder
> The dots in the folder names are replaced by tabs.
>
> I was able to recover things by editing the file as follows:
> Sent
> Trash
> Drafts
> Junk
> shared/testuser1 at sub.domain.tld/INBOX/folder
>
> This means that Maildir++ and V2 subscription can't handle dots in
folders.
>
> I found a previous discussion:
https://dovecot.org/pipermail/dovecot/2021-January/121233.html
> But the final advice can't be applied on our side:
> - changing LAYOUT to FS is not possible for us
> - we have already migrated the dot separator to slash
> - changing the layout only for shared namespaces does not solve the
problem and totally breaks the access to shared folders.
> Thanks a lot for your advice
> Best regards
> Julien
>
Hi, unfortunately this does not work with maildir++ layout. Only fix is to use
LAYOUT=FS or LAYOUT=index, which you said is not possible for you.
Aki