postconf -n

# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 6
home_mailbox = Maildir/
html_directory = no
inet_interfaces = all
inet_protocols = all
mail_owner = postfix
mailbox_command = /usr/libexec/dovecot/deliver
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, localhost
mydomain = maildomain.ru
myhostname = mail.maildomain.ru
mynetworks = 192.168.0.0/16, 127.0.0.0/8
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
sample_directory = /usr/share/doc/postfix-2.6.6/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_banner = $myhostname ESMTP Exchange 2020
smtpd_helo_required = yes
smtpd_recipient_restrictions = permit_mynetworks,                                                permit_sasl_authenticated,                                                reject_unauth_destination,                                                reject_unknown_sender_domain,                                                reject_unknown_recipient_domain,                                                reject_non_fqdn_recipient,                                                reject_non_fqdn_sender,                                                reject_non_fqdn_hostname,                                                reject_invalid_hostname,                                                reject_unknown_hostname
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
unknown_local_recipient_reject_code = 550
virtual_alias_maps = ldap:/etc/postfix/ldap_virtual_alias_maps.cf
virtual_gid_maps = static:5000
virtual_mailbox_base = /home/vmail
virtual_mailbox_domains = maildomain.ru
virtual_mailbox_maps = ldap:/etc/postfix/ldap_virtual_mailbox_maps.cf
virtual_minimum_uid = 100
virtual_transport = dovecot
virtual_uid_maps = static:5000

[root@s1mx1ls vmail]# cat /etc/postfix/ldap_virtual_alias_maps.cf
server_host = dc1.domain.local dc2.domain.local
server_port = 389
bind = yes
bind_dn = CN=ldapsearch,OU=Service Accounts,DC=domain,DC=local
bind_pw = Password
search_base = OU=Group,DC=domain,DC=local
query_filter = (&(objectClass=group)(mail=%s))
leaf_result_attribute = mail
special_result_attribute = member

[root@s1mx1ls vmail]# cat /etc/postfix/ldap_virtual_mailbox_maps.cf
server_host = dc1.domain.local dc2.domain.local
bind = yes
bind_dn = CN=ldapsearch,OU=Service Accounts,DC=domain,DC=local
bind_pw = Password
search_base = OU=GroupOfCompanies,DC=domain,DC=local
query_filter = (&(objectClass=user)(mail=%s))
result_attribute = sAMAccountName
result_format = %s