[Dovecot] hardlinks deliver not work

[Arnaud Yonnet]

hello,
I try to use the deliver dovecot with hardlinks.
in command line, it's work with this command
/usr/lib/dovecot/deliver  -p themail -d user

when i send mail with postfix. I received the mail for all users but it 
doesn't create hardlinks.

i check with command line

md5sum themail

it same for all mail .
but it don't create hardlinks.

in my master.cf
  dovecot    unix  -       n       n       -       -       pipe
     user=utilisateurmail:utilisateurmail argv=/usr/lib/dovecot/deliver 
-d ${user}

have you got a solution ?

thinks you

Arnaud Yonnet

ps,  im sorry. my English is really poor....