Some errors in /var/log/maillog

[Keith Morse]

On Thu, 4 Sep 2003, Swapana Ghosh wrote:

> 
> Hi
> 
>     We are running sendmail in one of our server. Last few days in the 
> /var/log/maillog  , i am getting this type of error messages.
> 
> Sep  4 00:25:01 server sendmail[23133]: gethostbyaddr(xxx.xxx.xx.35) failed: 1
> Sep  4 00:25:01 server sendmail[23133]: gethostbyaddr(xxx.xxx.xx.37) failed: 1
> Sep  4 00:25:01 server sendmail[23133]: gethostbyaddr(xxx.xxx.xx.56) failed: 1
> 
>  Can anybody give me some hints..
> 
> Thanks.
> -Swapna
> 


Reverse lookup failed?  the zone for xxx.xxx.xx.35 (and others) doesn't 
have any PTR records for that ip or the zone does not exist on any dns 
server.