N

neodym

That’s indeed a good solution. Thanks for the suggestion, @accolon!
I do have stable private keys. I forgot that one can have multiple TLSA records.

However, it would still be nice to have an automated solution in case the Let’s Encrypt intermediate gets compromised and has to be replaced.

Hey there,

Sometimes Let’s Encrypt appears to randomly switch between its intermediate certs

Let's Encrypt Community Support

Force use of R10 or R11 intermediate CA

Is complaining to the vendor/developer of this software not an option?

Since Let’s Encrypt does not support the selection of the intermediate cert, I see only one possible solutions:
Use a post-renewal hook to automatically update the TLSA record. However, I haven’t found any hooks exposed.

Do I need to modify the Dockerfile to introduce the hook into acme.sh myself or is there another way?
Are there other possible solutions for the problem?

Thanks,
neodym

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?