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What's causing "delivery temporarily suspended: mail transport,unavailable" errors?

From: Bernard Barton (bfb21comcast.net)
Date: Wed Feb 13 2008 - 22:13:33 CST


I have postfix 2.2 installed (See postconf -n below) on a godaddy.com server. The relay host is
k2smtpout.secureserver.net. This host that postfix is on is njlta.org and also known as njlti.org. I'm getting a "mail transport unavailable" error when attempting to send to some recipients. What could be causing this problem?

-Thanks

njlta:/home/super> postqueue -p
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
41EE8A65EBC 3793 Wed Feb 13 13:41:09 _n_d_iacpibhd.com
                  (delivery temporarily suspended: mail transport
unavailable)
                                         webmasternjlta.org

4897FA65EB6 864 Wed Feb 13 12:21:05
LeatrackageSmallwoodisprs2008-beijing.org
                  (delivery temporarily suspended: mail transport
unavailable)
                                         webmasternjlta.org

BDF7FA65EB0 786 Wed Feb 13 12:08:11 haskelplastmarket.com
                  (delivery temporarily suspended: mail transport
unavailable)
                                         infonjlta.org

postconf -n:

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
html_directory = /usr/share/doc/postfix-2.2.0-documentation/html
inet_interfaces = all
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, localhost
mydomain = secureserver.net
myhostname = njlti.org
mynetworks = 127.0.0.0/8 njlti.org njlta.org verizon.net
mynetworks_style = class
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.2.0-documentation/readme
relay_domains = $mydestination $mynetworks 68.178.161.148 127.0.0.0/8
verizon.net
relayhost = k2smtpout.secureserver.net
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_client_restrictions = check_client_access
hash:/etc/postfix/access check_sender_access hash
:/etc/postfix/access permit_mynetworks
smtpd_recipient_restrictions = permit_mynetworks
reject_unauth_destination, reject_rbl_client a
e.countries.nerd.dk reject_rbl_client ar.countries.nerd.dk
reject_rbl_client at.countries.nerd.
dk reject_rbl_client au.countries.nerd.dk reject_rbl_client
be.countries.nerd.dk reject_rbl_c
lient bg.countries.nerd.dk reject_rbl_client bo.countries.nerd.dk
reject_rbl_client br.countrie
s.nerd.dk reject_rbl_client ca.countries.nerd.dk reject_rbl_client
ch.countries.nerd.dk rejec
t_rbl_client ci.countries.nerd.dk reject_rbl_client
cl.countries.nerd.dk reject_rbl_client cn.c
ountries.nerd.dk reject_rbl_client cs.countries.nerd.dk
reject_rbl_client cy.countries.nerd.dk

mynetworks_style = class
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.2.0-documentation/readme
relay_domains = $mydestination $mynetworks 68.178.161.148 127.0.0.0/8
verizon.net
relayhost = k2smtpout.secureserver.net
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_client_restrictions = check_client_access
hash:/etc/postfix/access check_sender_access hash
:/etc/postfix/access permit_mynetworks
smtpd_recipient_restrictions = permit_mynetworks
reject_unauth_destination, reject_rbl_client a
e.countries.nerd.dk reject_rbl_client ar.countries.nerd.dk
reject_rbl_client at.countries.nerd.
dk reject_rbl_client au.countries.nerd.dk reject_rbl_client
be.countries.nerd.dk reject_rbl_c
lient bg.countries.nerd.dk reject_rbl_client bo.countries.nerd.dk
reject_rbl_client br.countrie
s.nerd.dk reject_rbl_client ca.countries.nerd.dk reject_rbl_client
ch.countries.nerd.dk rejec
t_rbl_client ci.countries.nerd.dk reject_rbl_client
cl.countries.nerd.dk reject_rbl_client cn.c
ountries.nerd.dk reject_rbl_client cs.countries.nerd.dk
reject_rbl_client cy.countries.nerd.dk
  reject_rbl_client cz.countries.nerd.dk reject_rbl_client
de.countries.nerd.dk reject_rbl_clie
nt do.countries.nerd.dk reject_rbl_client ec.countries.nerd.dk
reject_rbl_client ee.countries.n
erd.dk reject_rbl_client es.countries.nerd.dk reject_rbl_client
fr.countries.nerd.dk reject_r
bl_client gr.countries.nerd.dk reject_rbl_client
gb.countries.nerd.dk reject_rbl_client hk.coun
tries.nerd.dk reject_rbl_client hu.countries.nerd.dk
reject_rbl_client it.countries.nerd.dk r
eject_rbl_client jp.countries.nerd.dk reject_rbl_client
kr.countries.nerd.dk reject_rbl_client
 kp.countries.nerd.dk reject_rbl_client il.countries.nerd.dk
reject_rbl_client it.countries.ner
d.dk reject_rbl_client nl.countries.nerd.dk reject_rbl_client
nz.countries.nerd.dk reject_rbl
_client pl.countries.nerd.dk reject_rbl_client pt.countries.nerd.dk
reject_rbl_client ro.countr
ies.nerd.dk reject_rbl_client ru.countries.nerd.dk reject_rbl_client
se.countries.nerd.dk rej
ect_rbl_client sg.countries.nerd.dk reject_rbl_client
si.countries.nerd.dk reject_rbl_client sk
.countries.nerd.dk reject_rbl_client th.countries.nerd.dk
reject_rbl_client tw.countries.nerd.d
k reject_rbl_client ua.countries.nerd.dk reject_rbl_client
uk.countries.nerd.dk reject_rbl_cl
ient za.countries.nerd.dk

unknown_local_recipient_reject_code = 550