Shared mailboxes, users with dots and a bug in subscriptions

[Tobias Stein]

Hi,

Thanks for your support.

So a workaround would involve the migration from the flat to an hierarchical LAYOUT=fs, 
change the hierarchy separator to „/‟ and the namespace separator to a rarely used symbol 
like „§‟. Okay, that actually sounds like a nightmare to me.

> But this would not resolve the actual bug, that subscriptions
> are not split and persisted correctly.
> In the end i would just be forced to use :LAYOUT=fs
> to mitigate the bug, even if i like the flat layout. :-)

What do you think about accepting the miss-behaviour and fixing the splitting function in 
"subscription-file.c" ? :-D

Best regards
Tobias
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Am Donnerstag, 28. Januar 2021, 16:06:46 CEST schrieb Aki Tuomi:
> > On 28/01/2021 16:55 Tobias Stein <tobias_stein at rockstable.it> wrote:
> > 
> > 
> > Hi Aki,
> > 
> > Thanks for your prompt reply! :-)
> > And because i classically forgot to attach
> > the dovecot-sysreport, i'll deliver it now. :-)
> > 
> > 
> > Yes, you're right. Setting :LAYOUT=fs would be a workaround.
> > I'd also have to migrate every
> > single mailbox to the new hierarchical layout.
> > The hierarchical separator list->sep would
> > indeed change to „/‟ and the subscriptions
> > would be split differently.
> > 
> > Please correct me when i'm wrong, but
> > the namespace/separator would have to be changed too,
> > to prevent splitting on another "wrong" position.
> > The current
> > shared/root at example	com/test	subtest
> > would become to
> > shared	root at example.com	test	subtest.
> > Which is also wrong because there is no user shared.
> > So the namespace separator could be set to again something
> > different (from „auth_username_chars‟ + "/+")
> > like „^°!§%&=?;:#¹²³‟ which all would be ugly.
> > And with namespace/sep set to „°‟ leading to the form
> > shared°root at example.com°test	subtest.
> > 
> > But this would not resolve the actual bug, that subscriptions
> > are not split and persisted correctly.
> > In the end i would just be forced to use :LAYOUT=fs
> > to mitigate the bug, even if i like the flat layout. :-)
> > 
> > I think there should be a default, which is valid
> > for a common deployment with all features working.
> > Maildir++ for sure is a great choice for this,
> > but the implementation has a flaw:
> > a hard-coded „separator‟, which collides with
> > the DNS label delimiter, when storing subscriptions.
> > 
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