We can already see that the Debian/RedHat patched 2.3 which is offered is broken because there is more than just "making it compile" with things like OpenSSL3, and yes, I can appreciate that it's not fully broken, but it's not fully working either.
Yeah, that's sort of what's holding me back from just blindly installing the Debian distro package. Whilst I'm no expert, I did spot some OpenSSL3 mentions looking briefly through the Debian bug tracker.
Do you have any opinion on the FreeBSD dovecot ? I'd rather stick with Debian but having a working mailserver on a current version of an OS is a somewhat higher importance.
If Stalwart was more mature than it currently is, I would have moved over to that already. Sadly that will have to wait for the next round of server refreshes in a few years time.