Wednesday, March 14, 2012

sendmail: unable to qualify my own domain name

In /var/log/maillog, if we see messages like 'unable to qualify my own domain name' and it takes abnormally long time for sendmail to restart, it is likely due to sendmail failing to find the FQDN of your host.

Look in /etc/hosts, you should append host name at the end:               localhost.localdomain localhost your-host-name


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