Why is my email (Smailer-Daemon) failing to be delivered (specifically Nagios Alerts)
 

I have the Nagios alert monitoring system installed and has been running fine for a while now but recently i had some corrupt conf files (I thought only my httpd.conf) and made some network config and httpd.cong changes before i actually found the correct problem. So now things are back up and running but nagios alerts (and im pretty sure any other mail) is failing to be sent out. Here is file from my /var/spool/clientmqueue folder:
Is there anyway i can find out whats causing this? logs, etc? Where is the "transcript?


V6
T1069059975
K0
N0
P31448
I3/3/1124936
Fr
$_localhost
$r
$slocalhost
${daemon_flags}c u
SMAILER-DAEMON
C:root
rRFC822; root@BCCKE-412C.coe.ncsu.edu
RPF:root
H?P?Return-Path: <g>
H??Received: from localhost (localhost)
by BCCKE-412C.coe.ncsu.edu (8.12.5/8.12.5/Submit) id hAH96FYV008072;
Mon, 17 Nov 2003 04:06:15 -0500
H?D?Date: Mon, 17 Nov 2003 04:06:15 -0500
H?F?From: Mail Delivery Subsystem <MAILER-DAEMON>
H?x?Full-Name: Mail Delivery Subsystem
H?M?Message-Id: <200311170906.hAH96FYV008072@BCCKE-412C.coe.ncsu.edu>
H??To: root
H??MIME-Version: 1.0
H??Content-Type: multipart/report; report-type=delivery-status;
boundary="hAH96FYV008072.1069059975/BCCKE-412C.coe.ncsu.edu"
H??Subject: Returned mail: see transcript for details
H??Auto-Submitted: auto-generated (failure)

Here is some info from my Mail log as well..... Please Help me :)

Nov 16 04:06:03 BCCKE-412C sendmail[24354]: hAG9632B024354: from=root, size=424, class=0, nrcpts=1, msgid=<200311160906.hAG9632B024354@BCCKE-412C.coe.ncsu.edu>, relay=root@localhost
Nov 16 04:06:03 BCCKE-412C sendmail[24354]: hAG9632B024354: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30246, relay=[localhost], dsn=5.1.2, stat=Host unknown (Name server: [localhost]: host not found)
Nov 16 04:06:03 BCCKE-412C sendmail[24354]: hAG9632B024354: hAG9632C024354: DSN: Host unknown (Name server: [localhost]: host not found)
Nov 16 04:06:03 BCCKE-412C sendmail[24354]: hAG9632C024354: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31448, relay=[localhost], dsn=5.1.2, stat=Host unknown (Name server: [localhost]: host not found)
Nov 16 04:06:03 BCCKE-412C sendmail[24354]: hAG9632C024354: hAG9632D024354: return to sender: Host unknown (Name server: [localhost]: host not found)
Nov 16 04:06:03 BCCKE-412C sendmail[24354]: hAG9632D024354: to=postmaster, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=32472, relay=[localhost], dsn=5.1.2, stat=Host unknown (Name server: [localhost]: host not found)
Nov 16 04:06:03 BCCKE-412C sendmail[24354]: hAG9632C024354: Losing ./qfhAG9632C024354: savemail panic
Nov 16 04:06:03 BCCKE-412C sendmail[24354]: hAG9632C024354: SYSERR(root): savemail: cannot save rejected email anywhere
Nov 16 05:45:13 BCCKE-412C sendmail[9549]: hAGAjDO8009549: from=nagios, size=283, class=0, nrcpts=1, msgid=<200311161045.hAGAjDO8009549@BCCKE-412C.coe.ncsu.edu>, relay=nagios@localhost
Nov 16 05:45:13 BCCKE-412C sendmail[9549]: hAGAjDO8009549: to=sjtoups@gwced.ncsu.edu, ctladdr=nagios (502/502), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30081, relay=[localhost], dsn=5.1.2, stat=Host unknown (Name server: [localhost]: host not found)
Nov 16 05:45:13 BCCKE-412C sendmail[9556]: hAGAjDnL009556: from=nagios, size=284, class=0, nrcpts=1, msgid=<200311161045.hAGAjDnL009556@BCCKE-412C.coe.ncsu.edu>, relay=nagios@localhost