I have 2 servers with Debian, set up with postfixadmin back then.
So far they ran on Debian-12.x (12.11) with this as external repo.list:
https://repo.dovecot.org/ce-2.3-latest/debian/bullseye/
This gives me:
dovecot-core 2.3.21.1-2+debian11
Fine.
Now I upgraded one of these servers to debian-13 and did NOT remove or edit the repo.list.
Now I have Debian-13.0.0 with still dovecot-core 2.3.21.1-2+debian11:
apt-cache policy dovecot-core dovecot-core: Installed: 2:2.3.21.1-2+debian11 Candidate: 2:2.3.21.1-2+debian11 Version table: *** 2:2.3.21.1-2+debian11 500 500 https://repo.dovecot.org/ce-2.3-latest/debian/bullseye bullseye/main amd64 Packages 100 /var/lib/dpkg/status 1:2.4.1+dfsg1-6 500 500 http://ftp.at.debian.org/debian trixie/main amd64 Packages 500 http://deb.debian.org/debian trixie/main amd64 Packages
I don't mind, it's OK for me, I still have to work through the config changes needed to upgrade to dovecot-2.4
Is this combination OK, is it problematic?
(for me things work so far, I can mail quite fine)
I consider doing it on a customer server this evening, and hope for a quick "it's fine!" from this ml ;-)
thanks all, Stefan