dovecot - Aug 2014 - mail_location hashing & lowercasing?

Currently, I'm using 
mail_location = mdbox:/var/spool/mail/%Ld/%Ln/mdbox

Now I want to add a partitioning (so I don'T have all directories in
one single directory), but can't find the right syntax:

mail_location = mdbox:/var/spool/mail/%Ld/<HASHING HERE>/%Ln/mdbox

It seems like I'd need to use
%N (new hash) on %Ln and then take a substring of that.

%2NLn

2 Characters of the %N hash of %Ln (the lowercase username)

But this gives me a verbatim "Ln" on the path!

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Ralf Hildebrandt <r at sys4.de> wrote:
> Currently, I'm using 
> mail_location = mdbox:/var/spool/mail/%Ld/%Ln/mdbox
> Now I want to add a partitioning (so I don'T have all directories in
> one single directory), but can't find the right syntax:
> mail_location = mdbox:/var/spool/mail/%Ld/<HASHING HERE>/%Ln/mdbox
> It seems like I'd need to use
> %N (new hash) on %Ln and then take a substring of that.
> %2NLn
> 2 Characters of the %N hash of %Ln (the lowercase username)
> But this gives me a verbatim "Ln" on the path!
Hm.

I have home=/srv/mail/%2NLn/%2.16NLn/%Ln/ in my auth-ldap.conf.ext and
this gives me a path like this: /srv/mail/0/08/myusername

I use version 2.2.13 of dovecot.

Beware: %2NLn does not give you two characters, it just gives you the
values 0 and 1, because it means
"mod(2,new_hash(lowercase(username)))"

If you want the first 2 characters, you need %256NLn, or better
%2.256NLn, see the section about modifiers in 
http://wiki2.dovecot.org/Variables

Gr??e,
Sven.

-- 
Sigmentation fault. Core dumped.