> On 07/02/2024 12:31 EET dovecot--- via dovecot <dovecot@dovecot.org> wrote:
>
>
> I have configured a shared private namespace in dovecot so that, via ACLs,
> users can access other users' mailboxes.
>
> I set up a quota for each user and this also works well. The quota is
> monitored and new messages are denied if the quota is exceeded.
>
> There is one problem though: apparently dovecot treats shared mailboxes in
> relation to the current user's quota, it does not consider (as would be
> appropriate) the shared mailbox owner's quota.
>
> I will try to explain better with a couple of examples.
>
> ==============
>
> Consider the following case:
>
> user1 has a quota of 1MB, totally available
> user2 has a quota of 10MB, totally available
> user1 shares the "Sales" mailbox with user2
> user2 copies a 500KB message to the shared "Sales" mailbox
> user1's quota will be correctly deducted by 500KB, thus resulting in
> 0.5MB available
>
> At this point, however, let's try another operation:
>
> user2 copies an 800KB message to the shared "Sales" mailbox.
>
> The server should return error because this way user1 exceeds the allocated
> quota of 1MB (500KB + 800KB), but instead the copy operation succeeds.
>
> This happens because at the time of the copy operation, dovecot considers the
> quota limit of user2 instead of considering the quota limit of user1.
>
> ==============
>
> Let us consider another case, performing the same operations but where the
> user quota limits are reversed (user1 has a larger quota than user2):
>
> user1 has a quota of 10MB, totally available
> user2 has a quota of 1MB, totally available
> user1 shares the "Sales" mailbox with user2
> user2 copies a 500KB message to the shared mailbox "Sales"
>
> The operation fails by overquota, because again dovecot considers user2's
> quota limit instead of considering user1's quota limit. Therefore, it is as
> if user2, with a 1MB limit, tries to write to a "larger" area (10MB).
>
> As a counterevidence, setting user1 and user2 with the same quota limit, the
> operation succeeds perfectly.
>
> ==============
>
> Can anyone help me solve the problem? Is this a problem that is related to my
> configuration?
> Below I attach the output of dovecot -n
>
Try
plugin {
quota_rule=Shared/*:ignore
}
Aki
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