Am 04.07.2017 um 19:13 schrieb Gordon Messmer:
On 07/04/2017 09:21 AM, Chris Olson wrote:
It remains a mystery what could have happened during a standard yum
update of the system to cause this domain and/or host related sendmail
issue.
Run "hostname". Has the hostname changed? Run "ls -l /etc/hosts
/etc/resolv.conf". Have those files changed recently?
It's possible that this system was working in the past because its
hostname was set up in DNS, and was removed. In that case, the problem
wasn't related to "yum." sendmail would (IIRC) continue working after
the system's hostname was removed from DNS, until the next time the
system rebooted.
Sendmail demands a hostname with at least a single dot in it. "computer"
is in no way a valid FQDN. "computer.localdomain" would be fine and if
it has an entry in /etc/hosts.
Alexander
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