unable to send mail from redhat linux server

 
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Operating Systems Linux Red Hat unable to send mail from redhat linux server
# 1  
Old 05-11-2012
unable to send mail from redhat linux server

While sending mail from linux server we observed below logs,

stat=Deferred: Name server: xxxxxxxxxx.: host name lookup failure

Kindly suggest what we need to change?


Thanks in Advance
# 2  
Old 05-11-2012
Are you able to ping that particular hostname?
# 3  
Old 05-11-2012
In the portion of the message not posted there is probably a "relay=" entry. I suspect that the name-to-address mapping for the mail relay server is missing on your system. If you use DNS, it needs enrolling on the DNS server. If you use /etc/hosts then the appropriate line is missing or mistyped.
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