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Cannot resolve PTR record issue

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Operating Systems Solaris Cannot resolve PTR record issue
# 1  
Old 08-20-2013
Wrench Cannot resolve PTR record issue
Hi guys,
I am currently receiving the following output in /var/log/syslog and is occurring every second leading to /var directory being full after every 2 days.


Code:
Aug 20 17:32:29 opaldn1 sendmail[2517]: [ID 801593 mail.notice] r7KCOlQm002517: ruleset=check_rcpt, arg1=<postmaster@silverapp6>, relay=[172.21.100.5], reject=450 4.4.0 <postmaster@silverapp6>... Relaying temporarily denied. Cannot resolve PTR record for 172.21.100.5

silverapp6 is a node in the network and its IP address is 172.21.100.5.

opaldn1 is the DNS server of my environment on which this error is occurring.

How can I resolve this ?

Regards
# 2  
Old 08-20-2013
Hello,

You can set up a script for same, lets say script will send you an email when directory is 80% filled. then you can login to server and make the file empty or in script it self you can make the file empty, again it is up to your need.


Please let me know if you need any further suggestions.

Thanks,
R. Singh
# 3  
Old 08-20-2013
I need to resolve the issue. The error should NOT occur. How can I get that done ?
# 4  
Old 08-20-2013
Can you resolve the IP address from the command line:-
Code:
nslookup 172.21.100.5

If not, then I would suggest that the DNS server needs to have a reverse looking record added.


I hope that this helps,
Robin
Liverpool/Blackburn
UK
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