[Dovecot] Shared mailboxes basics

Timo Sirainen tss at iki.fi
Fri Mar 19 23:19:52 EET 2010

On Fri, 2010-03-19 at 22:09 +0100, Thomas Hummel wrote:
> On Fri, Mar 19, 2010 at 09:11:32PM +0200, Timo Sirainen wrote:
> Thanks for your answer Timo.
> > > a) I wonder if TB even support the SETACL command since I don't see how I can
> > >    modify an ACL through the TB UI.
> > 
> > It doesn't.
> Ouch! What known UA does support it ? 

Mulberry, Kolab, some webmail plugins maybe.

> What's the point of supporting only GETACL ?

I guess it just shows nicely what mailboxes are shared.

> I guess this means that if users
> run this client, shared mailboxes have to be managed by an administrator, right
> ?

Or some custom web interface.

> > Yes, they're basically the same. But in that context "easier for virtual
> > users" means "easier if all your users use the same uid", since most
> > people use the same uid for virtual users.. (I don't think wiki confuses
> > these two things?)
> Ok, but I still don't quite get it : if you use the same UID, doesn't this
> somehow equates giving something like 777 modes in the system user case ? (I
> mean on an OS level, problems related to such loose permission are the same
> and, if in 777, permissions are no longer a problem for dovecot) ?

Pretty much. But 0777 permissions are somewhat worse for security than
just giving a single shared uid 0700 permissions. :) So there's nothing
magical about virtual users making this easier. It's just that most
people wouldn't like using 0777/0666 permissions for all mails..
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