I decided to switch my custom mail server install (postifx, dovecot, SOGo) to mailcow (thanks a lot for this fine piece of software).
After installation, I set up the mailboxes, domains etc. Then, I copied over the Maildirs of the previous install (preserving timestamps, changing uid & gid) to the Docker volume.
The inbox looks fine (emails do not sort correctly in SOGo, though), but the sent messages folder (Sent Messages with a space) is empty (despite being 1 GB on disk). Opening the source folder in mutt confirms that all the mails are there. Similarly, I can open the the folder in the Docker volume (/var/lib/docker/volumes/mailcowdockerized_vmail-vol-1/_data/domain.tld/user/Maildir/Sent Messages) and, again, see all the mails.
The logs do not show anything, as far as I can tell. I already tried renaming the folder to Sent in order to avoid the space character, but this didn’t work either.
The /var/lib/docker/volumes/mailcowdockerized_vmail-vol-1/_data/domain.tld/user/Maildir/ looks like this:
drwx------ 23 5000 5000 4.0K Jan 2 02:58 .
drwx------ 3 5000 5000 4.0K Jan 2 02:58 ..
drwx------ 5 5000 5000 4.0K Jan 2 02:55 .Archive
drwx------ 5 5000 5000 4.0K Jul 9 2018 Archive
drwx------ 2 5000 5000 952K Jan 2 02:58 cur
drwx------ 5 5000 5000 4.0K Jan 2 01:29 '.Deleted Messages'
-rw------- 1 5000 5000 0 Jan 2 01:21 dovecot-acl-list
-rw------- 1 5000 5000 231K Jan 1 12:02 dovecot.index
-rw------- 1 5000 5000 12M Jan 1 13:31 dovecot.index.cache
-rw------- 1 5000 5000 11K Jan 1 13:31 dovecot.index.log
-rw------- 1 5000 5000 33K Dec 30 13:37 dovecot.index.log.2
-rw------- 1 5000 5000 90 Jul 8 2018 dovecot-keywords
-rw------- 1 5000 5000 72 Jul 13 2018 dovecot.mailbox.log
-rw------- 1 5000 5000 664K Jan 2 02:58 dovecot-uidlist
-rw------- 1 5000 5000 8 Aug 23 2018 dovecot-uidvalidity
-rw------- 1 5000 5000 0 Jul 8 2018 dovecot-uidvalidity.4e60e599
drwx------ 5 5000 5000 4.0K Dec 17 10:10 .Drafts
drwx------ 5 5000 5000 4.0K Dec 15 13:29 Drafts
drwx------ 5 5000 5000 4.0K Jul 9 2018 '.Entw&APw-rfe'
drwx------ 5 5000 5000 4.0K Jan 2 01:29 .Junk
drwx------ 5 5000 5000 4.0K Dec 22 22:26 Junk
drwx------ 5 5000 5000 4.0K Jul 9 2018 .Junk-E-Mail
-rw------- 1 5000 5000 701 Jan 1 12:22 maildirsize
drwx------ 2 5000 5000 4.0K Jan 2 02:58 new
drwx------ 5 5000 5000 4.0K Jan 1 13:22 Notes
drwx------ 5 5000 5000 4.0K Jan 2 02:55 .Papierkorb
drwx------ 5 5000 5000 4.0K Aug 23 2018 Papierkorb
drwx------ 5 5000 5000 4.0K Dec 17 10:10 'Sent Messages'
drwx------ 5 5000 5000 4.0K Jan 2 01:29 '.Sent Messages'
drwx------ 5 5000 5000 4.0K Jul 9 2018 .spam
-rw------- 1 5000 5000 86 Jul 13 2018 subscriptions
drwx------ 2 5000 5000 4.0K Jan 2 02:58 tmp
drwx------ 5 5000 5000 4.0K Jul 9 2018 .Trash
drwx------ 5 5000 5000 4.0K Jan 1 12:22 Trash
How do I get this Sent Messages folder to work?