Hi all.
I have a problem in configuration Mail Server for my company.
Gentoo/Linux, postfix-2.7.3, dovecot-2.0.11, AD-Windows2008R2
main.cf:
virtual_mailbox_maps = ldap:/etc/postfix/ldap-users.cf, ldap:/etc/postfix/ldap-users_oblr.cf
I create a two ldap files for search Multiple mailboxes in attribute AD (mail, othermailbox).
ldap-users.cf:
server_host = srv-ad.cn.energy
search_base = dc=cn,dc=energy
version = 3
bind = yes
bind_dn = admin
bind_pw = passwd
chase_referrals = no
scope = sub
query_filter = (&(objectclass=person)(|(mail=%s))(!(userAccountControl=514)))
result_attribute = mail
result_format = %s/
ldap-users_oblr.cf:
server_host = srv-ad.cn.energy
search_base = dc=cn,dc=energy
version = 3
bind = yes
bind_dn = admin
bind_pw = passwd
chase_referrals = no
scope = sub
query_filter = (&(objectclass=person)(|(otherMailbox=%s))(!(userAccountControl=514)))
result_attribute = otherMailbox

So, you want to know why it was done so stupid?
I'll try to explain. I have an account in AD ( eg Ross).
In the mail attribute is written, my main mailbox ross@energo.cg.ukrtel.net, and attribute otherMailbox my additional mailboxes simbios@oblr.cn.energy.gov.ua,..., Etc.
Postfix does not know how to work with attributes that have multiple meanings.
If I'm wrong correct me. ) ) )
Dovecot, respectively, too... ) ) )
What to do in this situation? Maybe there is some solution?

dovecot-ldap.conf:
user_attrs = mail=mail=maildir:/var/spool/mail/%$, quotaBytes=quota_rule=*:bytes=%$
user_filter = (&(objectClass=Person)(sAMAccountName=%n))
pass_attrs = userPassword=password
pass_filter = (&(objectClass=posixAccount)(uid=%u))

ls /var/mail
ross@energo.cg.ukrtel.net simbios@oblr.cn.energy.gov.ua
This directory create postfix. With ross Dovecot working fine, but with simbios NOT.

Many thanks for your help!