Relay con postfix

[Fabian Donoso C.]

Buenos días a todos:
	Tengo RH8 con 

[root en mail postfix]# rpm -qa | grep postfix
postfix-1.1.12-0.8

y necesito urgentemente (con esta version, ya veré la forma de actualizar la
distro y postfix) saber si puedo configurar postfix para que envíen desde
fuera de la empresa, sino me equivoco con sasl o tls (cual de los 2?) como
puedo ver si esta versión tiene soporte para eso?

Esto es lo que me esta pasando con un usuario que esta enviando desde fuera.

Aug 30 18:08:24 mail postfix/smtpd[6345]: reject: RCPT from
42-172-226.leased.cust.tie.cl[200.42.172.226]: 554 <fdonosoc en gmail.com>:
Recipient address rejected: Relay access denied;
from=<hmendoza en lapreferida.cl> to=<fdonosoc en gmail.com>

Postconf -n

[root en mail postfix]# postconf -n
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
append_at_myorigin = yes
body_checks = regexp:/etc/postfix/reject_virus
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
header_checks = regexp:/etc/postfix/reject_subject
inet_interfaces = all
mail_owner = postfix
mail_spool_directory = /var/mail
mailbox_command = /usr/bin/procmail
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
maps_rbl_domains = relays.ordb.org, list.dsbl.org, sbl.spamhaus.org,
sbl-xbl.spamhaus.org
message_size_limit = 18582912
mydestination = $myhostname, localhost.$mydomain, $myhostname, $mydomain,
$myorigin, mail.fastdeli.cl, fastdeli.cl
mydomain = lapreferida.cl
myhostname = mail.lapreferida.cl
mynetworks = 89.0.0.147/8, 127.0.0.0/8
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-1.1.12/README_FILES
relay_domains = $mydestination
sample_directory = /usr/share/doc/postfix-1.1.12/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_client_restrictions = permit_mynetworks, reject_maps_rbl,
check_relay_domains
smtpd_recipient_restrictions = permit_mynetworks, check_sender_access
hash:/etc/postfix/restricted_senders, reject_unauth_destination
smtpd_restriction_classes = external_mail, local_only
smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/access,
reject_unknown_sender_domain, reject_non_fqdn_sender, permit_mynet works



Atte. 
:::::::::::::::::::::::::::::::::::::::::::: 
Fabian Donoso C. 
http://fdonosoc.phpnet.us (Mi Website - Nuevas Noticias)