[Postfix-es] Postfix - Problema de permisos - mail_queue_enter

[Edgardo Nuevo]

Saludos listeros.
Tengo un sistema FreeBSD 6.1, con Postfix 2.0.20, Cyrus Sasl 2.1.20,
Courier Imap 4.1.1 y Postgresql 8.1.4

Revisando el maillog observe el siguiente mensaje:

postfix/postdrop[718]:warning: mail_queue_enter: create file
maildrop/848711.718: Permission denied

Investigue el mensaje y es por un problema de permisos, ejecute el
siguiente comando:
# postfix set-permissions
# postfix reload

Pero el problema persiste, agradecere si alguien puede orientarme.
El archivo main.cf y los permisos de postfix :

# ee /etc/postfix/main.cf
	queue_directory = /var/spool/postfix
	command_directory = /usr/sbin
	daemon_directory = /usr/libexec/postfix
	mail_owner = postfix
	default_privs = nobody
	default_transport = smtp
	alias_maps = hash:/usr/local/etc/postfix/aliases
	alias_database = hash:/usr/local/etc/postfix/aliases
	readme_directory = no
	sample_directory = /usr/local/etc/postfix
	sendmail_path = /usr/sbin/sendmail
	setgid_group = maildrop
	manpage_directory = /usr/local/man
	newaliases_path = /usr/local/bin/newaliases
	mailq_path = /usr/local/bin/mailq
	smtpd_banner = $myhostname ESMTP "Version no disponible"
	disable_vrfy_command = yes
	local_transport = virtual	
	local_recipient_maps = $virtual_mailbox_maps
	smtpd_sasl_auth_enable = yes
	smtpd_sasl_security_options = noanonymous
	smtpd_sasl_application_name = smtpd
	broken_sasl_auth_clients = yes
	smtpd_recipient_restrictions = permit_sasl_authenticated,
permit_mynetworks, reject_unauth_destination

# ls -l /var/spool/postfix
	drwx------   2 postfix  wheel     512 Aug  8 21:27 active
	drwx------   2 postfix  wheel     512 Aug  8 14:22 bounce
	drwx------   2 postfix  wheel     512 Aug  2 14:24 corrupt
	drwx------  11 postfix  wheel     512 Aug  2 16:38 defer
	drwx------  11 postfix  wheel     512 Aug  2 16:38 deferred
	drwx------   2 postfix  wheel     512 Aug  2 16:38 flush
	drwx------   2 postfix  wheel     512 Aug  2 14:24 hold
	drwx------   2 postfix  wheel     512 Aug  8 21:27 incoming
	drwx-wx---   2 postfix  maildrop  512 Aug  8 20:46 maildrop
	drwxr-xr-x   2 root     wheel     512 Aug  4 03:01 pid
	drwx------   2 postfix  wheel     512 Aug  8 11:36 private
	drwx--x---   2 postfix  maildrop  512 Aug  8 11:36 public
	drwx------   2 postfix  wheel     512 Aug  2 14:24 saved
	drwx------   2 postfix  wheel     512 Aug  2 14:24 trace