Dear Maintainer,

Cyrus 3.6.4 and 3.8.2 have fixes for IMHO serius bugs in the search
engine squat.

https://github.com/cyrusimap/cyrus-imapd/issues/4660
(squatter fails while indexing mails missing some headers - typically
messages in Drafts and Trash)

https://github.com/cyrusimap/cyrus-imapd/issues/4692
(Not yet squattered emails are always returned on any search)

Is it possible to get 3.6.4 in Debian stable (instead of 3.6.1)?
Looking at the changelogs it looks that 3.6.x releases are only
bugfixes, and could fit in debian's policy of only fixing bugs in stable.
https://www.cyrusimap.org/dev/imap/download/release-notes/3.6/x/3.6.4.html

If upgrading to 3.6.4 is not workable, how about cherrypicking of these
two patches?
I have a patch file just for them, tested in production, and it works well.

Best regards,
Vladislav Kurz

bookworm has fallen out of the Release Team's support, so to get the
cherrypicked patches in, you would have to ask the LTS Team by now.