Character not allowed in mailbox name

[Timo Sirainen]

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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