From Fedora Directory Server

integrating Dovecot with FDS+Postfix

This application is used so that the postfix MTA could connect to FDS via both IMAP or POP3. You will need another file which is /etc/dovecot-ldap.conf as part of /etc/dovecot.conf. The detail are shown below:

Dovecot main config

protocols = imap pop3
listen = [::]
default_mail_env = maildir:~/Maildir
auth default {
mechanisms = plain
  passdb ldap {
    # Path for LDAP configuration file, see doc/dovecot-ldap.conf for example
    args = /etc/dovecot-ldap.conf
  }
  userdb ldap {
    # Path for LDAP configuration file, see doc/dovecot-ldap.conf for example
    args = /etc/dovecot-ldap.conf
  }

Using FDS as backend

As i dont find any best matched schema for postfix to able to integrate with FDS, so the builtin schema with mailgroup object may the best choice ever...:-) I only use two atribute of mailgroup to get this done, which is "mail" and "mgrpDeliverTo".

hosts = fdsvr.fds.co.id
dn = "cn=Directory Manager"
dnpass = "fdsmanager"
ldap_version = 3
base = dc=fds, dc=co, dc=id
deref = never
scope = subtree
user_filter = (&(objectClass=mailgroup)(mgrpDeliverTo=%u))
pass_filter = (&(objectClass=posixAccount)(uid=%u))
default_pass_scheme = CRYPT