dovecot - Feb 2020 - Can't move/delete folder "Renaming not supported across conflicting directory permissions"

Dear all, 

several users have reported that they were unable to move/delete
folders using Thunderbird and they got the message "Renaming not
supported across conflicting directory permissions". When I google for
this message, I see hints like "your mail may not be all on the same
volume", but here this is definitely not the case. All mail is in
/var/mail/virtual and owned by mail:mail

Curiously, when I tried the same operation in Roundcube, there was no
error reported, so something about the combination of Thunderbird and
Dovecot seems to be causing the error. 

Does anyone have advise on how I should go about tracking down the
cause of the error?

Thanks a lot in advance!

Johannes

On 24.2.2020 10.04, Johannes Rohr wrote:
> Dear all, 
>
> several users have reported that they were unable to move/delete
> folders using Thunderbird and they got the message "Renaming not
> supported across conflicting directory permissions". When I google for
> this message, I see hints like "your mail may not be all on the same
> volume", but here this is definitely not the case. All mail is in
> /var/mail/virtual and owned by mail:mail
>
> Curiously, when I tried the same operation in Roundcube, there was no
> error reported, so something about the combination of Thunderbird and
> Dovecot seems to be causing the error. 
>
> Does anyone have advise on how I should go about tracking down the
> cause of the error?
>
> Thanks a lot in advance!
>
> Johannes 
>
Perhaps mail logs would reveal more?

Aki

Dear Johannes,

On Mon, 24 Feb 2020 09:04:17 +0100, Johannes Rohr
<johannes at rohr.org> wrote:
> several users have reported that they were unable to move/delete
> folders using Thunderbird and they got the message "Renaming not
> supported across conflicting directory permissions". When I google for
> this message, I see hints like "your mail may not be all on the same
> volume", but here this is definitely not the case. All mail is in
> /var/mail/virtual and owned by mail:mail
> 
> Curiously, when I tried the same operation in Roundcube, there was no
> error reported, so something about the combination of Thunderbird and
> Dovecot seems to be causing the error. 
> 
> Does anyone have advise on how I should go about tracking down the
> cause of the error?
I am also experiencing this problem.  It's only Thunderbird that has
problems renaming or deleting (certain) folders; other mail clients
handle these operations just fine.  I filed a bug against Thunderbird
for this back in April but haven't yet had any response:
https://bugzilla.mozilla.org/show_bug.cgi?id=1628600

Regards,
Tristan

-- 
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                  Tristan Miller
Free Software developer, ferret herder, logologist
             https://logological.org/
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