Sendmail is unable to qualify my own domain name
(Doc ID 1011800.1)
Last updated on JANUARY 02, 2018
Applies to:Solaris Operating System - Version 8 6/00 U1 to 11.1 [Release 8.0 to 11.0]
The following error message:
Apr 13 18:13:57 hostname sendmail: unable to qualify my own domain name (hostname.) -- using short name
or the message:
Cannot qualify own hostname.
This most typically seen after a new installation of Oracle Solaris. In the file /etc/nsswitch.conf the "files" source was being used first for hostname lookups:
hosts: files nis dns
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