dovecot - Jul 2019 - Character not allowed in mailbox name

Hi Arnold,

thanks for your assistance. I solved the issue right now by changing

prefix = Shared/%%u/
to
prefix = Shared/%%n/

This omits the @mydomain.de part which holds the dot causing the
trouble. Why this became a problem due to the update I wouldn't know.

Regards

Lothar

Am 22.07.2019 um 10:49 schrieb Arnold Opio Oree:
> Hi Lothar,
>
> I haven't yet had the opportunity to go deep into Dovecot engineering /
> development, (so please correct me if necessary anyone).
>
> I have experienced this exception where attempting to copy mailbox data
> within a client from IMAP account to IMAP account, but I have not had
> it cause a mailbox to become inaccessible.
>
> The reason was because Maildir++ format uses the "." separator to
> delineate child directories, and therefore the character is illegal in
> mailbox names. The issue was addressed by either changing the
> filesystem layout to LAYOUT=fs or by changing the mailbox format
> altogether to e.g. sdbox.
>
>>   location = maildir:%%h:INDEX=%h/shared/%%u
> I can see from your configuration that the LAYOUT is not set as fs, so
> I would assume is still using Maildir++.
>
> Perhaps this setting was lost during the upgrade?
>
> Regards,
>
> Arnold Opio Oree
> Chief Executive Officer
> Parallax Digital Technologies
>
> arnoldoree at parallaxdt.com
>
> http://www.parallaxdt.com
>
> tel : +44 (0) 333 577 8587
> fax : +44 (0) 20 8711 2477
>
> Parallax Digital Technologies is a trading name of Parallax Global
> Limited. U.K. Co. No. 08836288
>
> The contents of this e-mail are confidential. If you are not the
> intended recipient you are to delete this e-mail immediately, disregard
> its contents and disclose them to no other persons.
>
> -----Original Message-----
> From: Lothar Schilling via dovecot <dovecot at dovecot.org>
> Reply-To: Lothar Schilling <ls at proasyl.de>
> To: dovecot at dovecot.org
> Subject: Character not allowed in mailbox name
> Date: Mon, 22 Jul 2019 08:33:45 +0200
>
> Hi everybody,
>
> after an update this morning to dovecot 2.3.7 we cannot connect to our
> shared mailboxes anymore. The error message as issued in Thunderbird:
>
> "Character not allowed in mailbox name '.'"
>
> I didn't change anything about the configuration. Output of dovecot -n:
>
> [...]
> namespace {
>   list = children
>   location = maildir:%%h:INDEX=%h/shared/%%u
>   prefix = Shared/%%u/
>   separator = /
>   subscriptions = yes
>   type = shared
> }
> [...]
>
> Any help would be appreciated, thank you very much.
>
> Lothar Schilling
>
>
>
>
>

On 22 Jul 2019, at 10.34, Lothar Schilling via dovecot <dovecot at
dovecot.org> wrote:
> 
> Hi Arnold,
> 
> thanks for your assistance. I solved the issue right now by changing
> 
> prefix = Shared/%%u/
> to
> prefix = Shared/%%n/
> 
> This omits the @mydomain.de part which holds the dot causing the
> trouble. Why this became a problem due to the update I wouldn't know.
Accidental bug. Fixed by
https://github.com/dovecot/core/commit/62f3b738efd4a6444a4bde4a80bea208c5b39ccd
<https://github.com/dovecot/core/commit/62f3b738efd4a6444a4bde4a80bea208c5b39ccd>
> 
> Regards
> 
> Lothar
> 
> Am 22.07.2019 um 10:49 schrieb Arnold Opio Oree:
>> Hi Lothar,
>> 
>> I haven't yet had the opportunity to go deep into Dovecot
engineering /
>> development, (so please correct me if necessary anyone).
>> 
>> I have experienced this exception where attempting to copy mailbox data
>> within a client from IMAP account to IMAP account, but I have not had
>> it cause a mailbox to become inaccessible.
>> 
>> The reason was because Maildir++ format uses the "."
separator to
>> delineate child directories, and therefore the character is illegal in
>> mailbox names. The issue was addressed by either changing the
>> filesystem layout to LAYOUT=fs or by changing the mailbox format
>> altogether to e.g. sdbox.
>> 
>>>  location = maildir:%%h:INDEX=%h/shared/%%u
>> I can see from your configuration that the LAYOUT is not set as fs, so
>> I would assume is still using Maildir++.
>> 
>> Perhaps this setting was lost during the upgrade?
>> 
>> Regards,
>> 
>> Arnold Opio Oree
>> Chief Executive Officer
>> Parallax Digital Technologies
>> 
>> arnoldoree at parallaxdt.com
>> 
>> http://www.parallaxdt.com
>> 
>> tel : +44 (0) 333 577 8587
>> fax : +44 (0) 20 8711 2477
>> 
>> Parallax Digital Technologies is a trading name of Parallax Global
>> Limited. U.K. Co. No. 08836288
>> 
>> The contents of this e-mail are confidential. If you are not the
>> intended recipient you are to delete this e-mail immediately, disregard
>> its contents and disclose them to no other persons.
>> 
>> -----Original Message-----
>> From: Lothar Schilling via dovecot <dovecot at dovecot.org>
>> Reply-To: Lothar Schilling <ls at proasyl.de>
>> To: dovecot at dovecot.org
>> Subject: Character not allowed in mailbox name
>> Date: Mon, 22 Jul 2019 08:33:45 +0200
>> 
>> Hi everybody,
>> 
>> after an update this morning to dovecot 2.3.7 we cannot connect to our
>> shared mailboxes anymore. The error message as issued in Thunderbird:
>> 
>> "Character not allowed in mailbox name '.'"
>> 
>> I didn't change anything about the configuration. Output of dovecot
-n:
>> 
>> [...]
>> namespace {
>>  list = children
>>  location = maildir:%%h:INDEX=%h/shared/%%u
>>  prefix = Shared/%%u/
>>  separator = /
>>  subscriptions = yes
>>  type = shared
>> }
>> [...]
>> 
>> Any help would be appreciated, thank you very much.
>> 
>> Lothar Schilling
>> 
>> 
>> 
>> 
>> 
> 
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Am 22.07.2019 um 17:52 schrieb Timo Sirainen via
dovecot:
> Accidental bug. Fixed
>
by?https://github.com/dovecot/core/commit/62f3b738efd4a6444a4bde4a80bea208c5b39ccd
thanks a lot for this, that restored now all my installationd into a
working state, which were broken by 2.3.6 -> 2.3.7 upgrade.


Gru?
Matthias