[Dovecot] Dovecot auth query

[Murray Trainer]

Hi All,

I have my initial mailproxy setup with director through to my initial
backend mailstore.  POP3 and IMAP user authentication is working ok
on the proxy and the mailstore.  I just noticed when I do a "doveadm
auth lookup" on the proxy it appears to give correct results but when
I do it on the backend mailstore I get the error below.  Config on
the mailstore below.  Any ideas?  

Murray

root at mailproxy01:~# doveadm auth lookup mail1 at example.com
passdb: lookup auth succeeded
extra fields:
  user=lookup
  proxy
  pass=mail1 at example.com

root at mailstore01:~# doveadm auth lookup mail1 at example.com
passdb: lookup auth failed
extra fields:
  user=lookup

root at mailstore01:~# doveconf -n
# 2.1.7: /etc/dovecot/dovecot.conf
# OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.1
auth_debug = yes
auth_debug_passwords = yes
auth_mechanisms = plain login
auth_verbose = yes
auth_verbose_passwords = plain
disable_plaintext_auth = no
dotlock_use_excl = no
mail_debug = yes
mail_fsync = always
mail_location = maildir:~/
mmap_disable = yes
namespace {
  inbox = yes
  location =
  prefix = INBOX.
  type = private
}
passdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
plugin {
  mail_log_fields = uid box msgid size
  sieve = ~/.dovecot.sieve
  sieve_dir = ~/sieve
}
protocols = " imap lmtp pop3"
service lmtp {
  inet_listener lmtp {
    address = 27.54.95.41 127.0.01 ::1
    port = 24
  }
}
ssl_cert =