queue_directory = /var/spool/postfix
command_directory = /usr/local/sbin
daemon_directory = /usr/local/libexec/postfix
mail_owner = postfix
inet_interfaces = all
unknown_local_recipient_reject_code = 550

sendmail_path = /usr/local/sbin/sendmail
newaliases_path = /usr/local/bin/newaliases
mailq_path = /usr/local/bin/mailq
setgid_group = maildrop

myorigin = ****.org
mydestination =
local_recipient_maps =
local_transport = error:local mail delivery is disabled
virtual_alias_maps = hash:/usr/local/etc/postfix/virtual
mynetworks = 127.0.0.0/8 10.237.0.0/24
relay_domains = ****.org
parent_domain_matches_subdomains =
    debug_peer_list smtpd_access_maps
smtpd_recipient_restrictions =
    permit_mynetworks reject_unauth_destination

#relay_recipient_maps = hash:/usr/local/etc/postfix/relay_recipients
relay_recipient_maps =
transport_maps = hash:/usr/local/etc/postfix/transport


[root@spamwall /usr/local/etc/postfix]# ls -a
.                   aliases             header_checks       makedefs.out        postfix-script      transport.db
..                  bounce.cf.default   main.cf             master.cf           relay_recipients    transport.old
LICENSE             canonical           main.cf.default     mydestination       relay_recipients.db virtual
TLS_LICENSE         dist                main.cf.old         post-install        relocated           virtual.db
access              generic             make_hashes         postfix-files       transport           virtual.old


[root@spamwall /usr/local/etc/postfix]# cat transport
****.org smtp:[mail.****.org]

Aug 29 16:45:55 spamwall postfix/qmgr[1068]: AC8A31142E: to=<mlarson@****.org>, relay=none, delay=3, delays=3/0/0/0, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to ****.org[10.237.0.11]: Connection refused)

10.237.0.11 == DNS Server, why is this happening?