Viktor Dukhovni:
general advice: check your /etc/resolv.conf
usually there is no need for other lines then "nameserver $NAMESERVER_IP"
especially check if "searchdomain" is present and needed and should be
removed.
This advice is not right, Postfix works ...
Yes, BUT:
I had not only postfix in mind. Other server software does not so many things
right as postfix does. For that reason "general" ...
A server should generally be well configured to use only fully
qualified domainnames.
As a consequence a server does not need a searchdomain in /etc/resolv.conf
and therefor it could be removed.
I do so for many years and saw some strange things went away.
That's simply my experience running numerous different server over the years.
Andreas
