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postfix/smtpd[5347]: warning: 10.64.217.190: address not listed for hostname ykinoshi.sales.example.com

Solution Verified - Updated 2014-04-01T08:16:11+00:00 -

Issue

What does the following log mean in maillog?

postfix/smtpd[5347]: warning: 10.64.217.190: address not listed for hostname ykinoshi.sales.example.com

Environment

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 5
postfix

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