Sorry for the noise, I've solved my issue.
2013/4/24 Antoine Nguyen <ngu.antoine at gmail.com>
> Dear all,
>
> I encounter a strange issue with the *doveadm user* command. (dovecot
> 2.1.16)
>
> I try to retrieve information about a specific user but dovecot says it
> doesn't exist (whereas I just created it). The following command fails:
>
> $ sudo -u vmail doveadm user pouet at domain.tld
> userdb lookup: user pouet at domain.tld doesn't exist
>
> If I try a more global lookup, the user is properly found:
>
> $ sudo -u vmail doveadm user *@domain.tld
> user1 at domain.tld
> *pouet at domain.tld*
>
> Sending a query for another user works well. For example :
>
> $ sudo -u vmail doveadm user user1 at domain.tld
> userdb: user1 at domain.tld
> home : /var/vmail/domain.tld/user1
> uid : 500
> gid : 500
> quota_rule: *:bytes=100M
>
> I really don't understand what's happening... The only difference I
see
> between the users is that user1 was created when I was using dovecot 1.2...
>
> Thanks for your help.
>