On 23.11.2012, at 17.53, Sven Hartge wrote: >>>> BTW. Do you have multiple Dovecot backend servers? Director works >>>> only when you're not using shared mailboxes.. > >> You can't reliably do it if the mailboxes are accessed directly via >> NFS. The current idea to solve this is to use imapc backend with >> master users, so the actual mailbox access for each user is always >> done by only one server. I think someone already managed to configure >> such a setup. > > This was me. > > It works (with one minor quirk, more on this later) in my current test > setup like so: > > a) 1 to X user-servers with the users mailboxes on them > b) 1 shared-server with the shared mailboxes on them
For implementing shared mailboxes between all user servers, I think what would need to be developed is: > imapc_host = m-st-sh-01.example.com > imapc_master_user = %u > imapc_user = shared Somehow being able to set "imapc_user = %%u" where %%u expands to the shared namespace's username. Or maybe setting the imapc_user automatically to that when accessing it via type=shared namespace. > Note: You CANNOT have ACLs activated on the users-servers, because this > will interfere with the permissions of ht IMAPShared namespace, > rendering the mailboxes located in there unavailable for your users. And some way to disable ACLs for shared namespaces that use imapc. Not sure what would be a nice way of doing this. The attached patch contains these two changes. The first one I could commit immediately. The second one probably would need to be configurable somehow (maybe a generic disable_acls=yes setting for namespace?)
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> Now the mentioned quirk: Because all connections on the shared-server > are made to the same user "shared" and are coming from very few IPs > (the 1 to X user-servers), you need to set a very high > mail_max_userip_connections value. > > I set mine to 1000 just to be sure. > > ---> But: I have NOT configured login_trusted_networks, so this may be > my error in that case. I don't think that setting helps.
