dovecot - Feb 2023 - Restored mail folders conflict with renamed original ones

> On 20/02/2023 23:42 EET Nikolaos Milas <nmilas at noa.gr> wrote:
> 
> 
> Hello,
> 
> We are running Dovecot 2.3.18 (together with Postfix) on CentOS 7. It uses
a Maildir structure.
> 
> We have a user who has organized his mailbox as shows up at the end of this
mail. The user had forgotten that he had renamed his "Grants Active \
European" (.Grants Active.European) folder to "Grants Active \
International" (.Grants Active.International), he thought that it was lost
and requested a restore of "Grants Active \ European" (with all of its
subfolders) from backup.
> 
> Since we did that (using a simple "cp -rp" from a backup,
observing timestamps, ownership and permissions), mail client software won't
see "European" mail folder in"Grants Active" mail folder;
"International" mail folder shows up but only with two folders, those
which do not exist in "European" branch (obviously, these were created
later).
> 
> I have tried to run the command "doveadm index -u userx Grants\
Active" and likewise for each and every mail subfolder under "Grants\
Active"; I have also tried deleting the dovecot.index.cache and
dovecot.index.log from the latter ("Grants\ Active") and then run:
> 
> > doveadm -vD force-resync -u userx Grants\ Active
> but it didn't do the trick: Mail clients are still stuck as I
explained.
> 
> In the end, I thought that the snag might be that mail folders that are not
appearing have identical (duplicate) UIDs; As an example:
> 
> > [root at mailx .Grants Active.European]# cat dovecot-uidlist
> >  3 V1548680759 N1 G64e70a1130343f61003c0000715faa8d
> >  [root at mailx .Grants Active.European]# cd ..
> >  [root at mailx Maildir]# cd .Grants\ Active.International
> >  [root at mailx .Grants Active.International]# cat dovecot-uidlist
> >  3 V1548680759 N1 G64e70a1130343f61003c0000715faa8d
> > 
> If so, how should we overcome this issue? 
> 
> I guess I could simply delete the restored folders to return to an
acceptable state? If nevertheless we need to restore the ".European"
mail folder from a backup (as it was before getting renamed), what would be the
right way to do so?
> 
> Is there another way to resolve the issue without deleting the restored
mail folders?
> 
> Here is the list of mail folders in this mailbox (I have intentionally
removed lots of them, to reduce irrelevant content; this mailbox includes a
large number of mail folders):
> 
Can you enable mail_debug=yes, restart, ask the user to access the folder(s) and
provide those logs?

Aki

On 21/2/2023 9:56 ?.?., Aki Tuomi wrote:
> Can you enable mail_debug=yes, restart, ask the user to access the 
> folder(s) and provide those logs?
Hi Aki,

Thank you for the reply.

I have done as you requested; I isolated the log lines for the user in 
question, and I pasted the log here:

    https://pastebin.com/vMGyikpA

At the end of the txt file you can see a directory listing of the 
directories associated with the problem.

It seems to me that the folders in question do not get opened and there 
is no error message or other log entry about them. They seem as being 
totally ignored.

I remain at your disposal for any additional information you may require.

I look forward to your feedback.

(Note: I initially tried to post the log text as an attachment, but it 
seems it remains blocked due to a message size limit.)

Thanks again,
Nick

-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://dovecot.org/pipermail/dovecot/attachments/20230222/8b93cbce/attachment.htm>