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Host name lookup failure.

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Operating Systems Solaris Host name lookup failure.
# 1  
Old 08-03-2009
Host name lookup failure.
Hi Gurus

I am getting the following message continuosly in my /var/adm/messages file:

Aug 3 13:31:21 mumux102 sendmail[19290]: [ID 801593 mail.info] n6UHxxTm019703: to=postmaster, delay=3+14:00:01, xdelay=00:00:00, mailer=relay, pri=30730707, relay=fisbomrelay.fnfis.com, dsn=4.0.0, stat=Deferred: Name server: fisbomrelay.fnfis.com: host name lookup failure

I find that ping to name server mentioned above is working fine.

[!]root: ping fisbomrelay.fnfis.com
fisbomrelay.fnfis.com is alive

Any idea what is causing this and how i can avoid this.

HG
# 2  
Old 08-03-2009
Quote:
nslookup www.yahoo.com
what it says?

run mailq command to see if there are many mails stuck in the queue.
# 3  
Old 08-05-2009
Hi

The mailq command output:

[!]root: mailq
/var/spool/mqueue is empty
Total requests: 0

Thanks
HG

---------- Post updated at 10:48 AM ---------- Previous update was at 10:46 AM ----------

Hi

nslookup output:

[!]root: nslookup fisbomrelay.fnfis.com
Server: chnqip01.corp.efunds.com
Address: 172.21.7.200
Non-authoritative answer:
Name: sbhfisbomgw01.fnfis.com
Address: 10.164.1.5
Aliases: fisbomrelay.fnfis.com
# 4  
Old 08-07-2009
can try telnet fisbomrelay.fnfis.com 25

basically it is just checking whether port 25 of fisbomrelay.fnfis.com is open to your server.

if you get connection closed means port 25 service not started on fisborelay or some filtering like firewall blocked it.
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