Prohibit dots in folder names

[Aki Tuomi]

On 10.01.2017 17:38, Marek Grondecki wrote:
> Hello Dovecot Community,
>
> I am using Dovecot 2.2.13-12~deb8u1 (Debian Jessie).
>
> separator = /
> listescape plugin is NOT active
> LAYOUT=fs is NOT active
>
> I would like to prohibit a creation of folders with dot "." in the
> names -
> so creation of a folder "foo.bar" should NOT be possible.
> Currently, when I create "foo.bar" in Outlook 2013 it will be created
> but won't be
> synchronised with the mail server - Outlook shows it as "foo.bar (Only
> this computer)".
> Ideally the user should receive an error message informing that "the
> folder foo.bar
> could not be created."
>
> Thank you for your help.
>
> Regards,
> Marek Grondecki

Are you sure the folder is actually created in dovecot instance?
Can you run doveadm mailbox status -u username foo.bar?

Aki