dovecot - Jul 2022 - Case sensitivity and unicode normalisation on ZFS for Dovecot Maildir

I'm wondering about some filesystem considerations when using Dovecot. 
I've read https://wiki.dovecot.org/FileSystems, but that basically talks 
about low-level details.  My question is not about that.

I use the following mail_location:
maildir:~/maildir:LAYOUT=fs:INBOX=~/maildir/INBOX:UTF-8

In this setup, because I use LAYOUT=fs and UTF-8, the IMAP names are 
identical to the directory names.  I noticed that the INBOX name is 
case-insensitive, but all other names are case-sensitive.  I wonder if 
it's possible to have consistent behaviour here.

Now since I use ZFS, I have the ability to make the filesystem case 
insensitive and to normalise unicode codepoints.  Is that something that 
would be useful when running a Dovecot server, or would that be a bad idea?

> On 06/07/2022 14:51 EEST J?rn ?ne de Jong <dovecot.list at
jornane.no> wrote:
> 
>  
> I'm wondering about some filesystem considerations when using Dovecot. 
> I've read https://wiki.dovecot.org/FileSystems, but that basically
talks
> about low-level details.  My question is not about that.
> 
> I use the following mail_location:
> maildir:~/maildir:LAYOUT=fs:INBOX=~/maildir/INBOX:UTF-8
> 
> In this setup, because I use LAYOUT=fs and UTF-8, the IMAP names are 
> identical to the directory names.  I noticed that the INBOX name is 
> case-insensitive, but all other names are case-sensitive.  I wonder if 
> it's possible to have consistent behaviour here.
> 
> Now since I use ZFS, I have the ability to make the filesystem case 
> insensitive and to normalise unicode codepoints.  Is that something that 
> would be useful when running a Dovecot server, or would that be a bad idea?
Hi!

RFC3501 specifically states that INBOX is special and case-insensitive. Other
boxes are not.

Aki