[Dovecot] Quota-Status issue

[Cyberonic Turbo]

Following this guide:
http://sys4.de/en/blog/2013/04/08/postfix-dovecot-mailbox-quota/ I can't
seem to get it to work, as soon as I add the smtpd_recipient_restrictions
setting to postfix I can no longer send mail at all. I get the message SMTP
Error (450): Failed to add recipient "postmaster at example.com" (4.7.1 :
Recipient address rejected: Internal error occurred. Refer to server log
for more information.). I googled around and found this command to test the
quota-status service: printf "recipient=postmaster at
example.com\nsize=1234\n\n"
| nc 127.0.0.1 12340
It seems to always return the quota_status_nouser message. I'm really
stumped here. What logs do I need to check for errors and does anyone have
any experience with this?

I'm running Dovect 2.2.10 with Postfix 2.6.6

Here's my dovecot -n result:

# 2.2.10: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-431.5.1.el6.x86_64 x86_64 CentOS release 6.5 (Final)
auth_master_user_separator = *
auth_mechanisms = PLAIN LOGIN
dict {
  acl = mysql:/etc/dovecot/dovecot-share-folder.conf
  quotadict = mysql:/etc/dovecot/dovecot-used-quota.conf
}
first_valid_uid = 2000
last_valid_uid = 2000
listen = *
log_path = /var/log/dovecot.log
mail_gid = 2000
mail_location = maildir:/%Lh/Maildir/:INDEX=/%Lh/Maildir/
mail_plugins = quota
mail_uid = 2000
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character
vacation subaddress comparator-i;ascii-numeric relational regex imap4flags
copy include variables body enotify environment mailbox date ihave
namespace {
  inbox = yes
  location =
  prefix =
  separator = /
  type = private
}
namespace {
  list = children
  location = maildir:/%%Lh/Maildir/:INDEX=/%%Lh/Maildir/Shared/%%u
  prefix = Shared/%%u/
  separator = /
  subscriptions = yes
  type = shared
}
passdb {
  args = /etc/dovecot/dovecot-mysql.conf
  driver = sql
}
passdb {
  args = /etc/dovecot/dovecot-master-users-password
  driver = passwd-file
  master = yes
}
plugin {
  acl = vfile
  acl_shared_dict = proxy::acl
  auth_socket_path = /var/run/dovecot/auth-master
  autocreate = INBOX
  autocreate2 = Sent
  autocreate3 = Trash
  autocreate4 = Drafts
  autocreate5 = Junk
  autosubscribe = INBOX
  autosubscribe2 = Sent
  autosubscribe3 = Trash
  autosubscribe4 = Drafts
  autosubscribe5 = Junk
  quota = dict:user::proxy::quotadict
  quota_grace = 10%%
  quota_rule = *:storage=1G
  quota_status_nouser = DUNNO
  quota_status_overquota = 552 5.2.2 Mailbox is full
  quota_status_success = DUNNO
  quota_warning = storage=85%% quota-warning 85 %u
  quota_warning2 = storage=90%% quota-warning 90 %u
  quota_warning3 = storage=95%% quota-warning 95 %u
  sieve = /%Lh/sieve/dovecot.sieve
  sieve_dir = /%Lh/sieve
  sieve_global_dir = /var/vmail/sieve
  sieve_global_path = /var/vmail/sieve/dovecot.sieve
}
protocols = pop3 imap sieve
service auth {
  unix_listener /var/spool/postfix/dovecot-auth {
    group = postfix
    mode = 0666
    user = postfix
  }
  unix_listener auth-master {
    group = vmail
    mode = 0666
    user = vmail
  }
  unix_listener auth-userdb {
    group = vmail
    mode = 0660
    user = vmail
  }
}
service dict {
  unix_listener dict {
    group = vmail
    mode = 0660
    user = vmail
  }
}
service imap-login {
  process_limit = 500
  service_count = 1
}
service pop3-login {
  service_count = 1
}
service quota-status {
  client_limit = 1
  executable = quota-status -p postfix
  inet_listener {
    port = 12340
  }
}
service quota-warning {
  executable = script /usr/local/bin/dovecot-quota-warning.sh
  unix_listener quota-warning {
    group = vmail
    mode = 0660
    user = vmail
  }
}
ssl = required
ssl_cert = </etc/pki/tls/certs/iRedMail_CA.pem
ssl_key = </etc/pki/tls/private/iRedMail.key
userdb {
  args = /etc/dovecot/dovecot-mysql.conf
  driver = sql
}
protocol lda {
  auth_socket_path = /var/run/dovecot/auth-master
  lda_mailbox_autocreate = yes
  log_path = /var/log/sieve.log
  mail_plugins = quota sieve autocreate
  postmaster_address = root
}
protocol imap {
  imap_client_workarounds = tb-extra-mailbox-sep
  mail_plugins = quota imap_quota autocreate
}
protocol pop3 {
  mail_plugins = quota
  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
  pop3_uidl_format = %08Xu%08Xv
}

For my postfix/main.cf I have this relevant setting:
smtpd_recipient_restrictions = reject_unknown_sender_domain,
reject_unknown_recipient_domain, reject_non_fqdn_sender,
reject_non_fqdn_recipient, reject_unlisted_recipient, check_policy_service
inet:127.0.0.1:7777, check_policy_service inet:127.0.0.1:10031,
check_policy_service inet:127.0.0.1:12340, permit_mynetworks,
permit_sasl_authenticated, reject_unauth_destination