Fwd: Character not allowed in mailbox name

[Lothar Schilling]

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
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>
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>
> -----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
>
>
>
>
>