Hello, I need help:

[root@dovecot]# dovecot -n # 2.1.16: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-358.18.1.el6.x86_64 x86_64 CentOS release 6.4 (Final) auth_debug = yes auth_mechanisms = plain login auth_use_winbind = yes auth_username_format = %u auth_verbose = yes base_dir = /var/run/dovecot/ disable_plaintext_auth = no listen = * mail_access_groups = vmail mail_debug = yes mail_gid = 5000 mail_location = maildir:~/:LAYOUT=fs mail_plugins = " quota acl" mail_privileged_group = vmail mail_uid = 5000 mbox_write_locks = fcntl namespace { list = children location = maildir:%%h:INDEX=~/shared/%%u prefix = shared/%%u/ separator = / subscriptions = no type = shared } namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { acl = vfile:/etc/dovecot/global-acls:cache_secs=300 autocreate = Sent autocreate2 = Trash autocreate3 = Drafts autosubscribe = Sent autosubscribe2 = Trash autosubscribe3 = Drafts quota = maildir:User quota quota_rule = *:storage=100M quota_rule2 = Trash:storage=+100M quota_rule3 = Sent:storage=+100M quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u } service auth { unix_listener /var/spool/postfix/private/auth { mode = 0666 } unix_listener auth-userdb { mode = 0666 user = vmail } } service quota-warning { executable = script /usr/local/bin/quota-warning.sh unix_listener quota-warning { user = vmail } user = dovecot } ssl = no ssl_cert =

[root@dovecot]# grep -v '^ *\(#.*\)\?$' dovecot-ldap.conf.ext hosts = dc1.domain.local dc2.domain.local dn = CN=ldapsearch,OU=Service Accounts,DC=domain,DC=local dnpass = ****** auth_bind = yes auth_bind_userdn = %Lu base = OU=GroupOfCompanies,DC=domain,DC=local deref = never scope = subtree user_filter = (&(!(userAccountControl:1.2.840.113556.1.4.803:=2))(|(mail=%Lu)(otherMailbox=%Lu)(sAMAccountName=%Lu))) user_attrs = sAMAccountName=home=/home/vmail/%L$, maxStorage=quota_rule=*:bytes=%$M pass_filter = (&(sAMAccountType=805306368)(sAMAccountName=%Lu)) pass_attrs = sAMAccountName=user,userPassword=password

With these settings the domain users successfully authenticate and can receive mail from their mail_localtion, however there are a few users with the same email address, but different sAMAccountName These users use the same e-mail on all connected by imap.

Tell me how to beat this situation?