> > I think we need a bit more information here. You say the system rebooted but > don't say way (the sendmail messages alone are not indicative of a reboot). > Was this a panic?
Where do I get more information? At least there is nothing more in syslog. > > My guess on the sendmail and groups issue is a name service problem. > Checking sendmail's source, the message prints h_errno returned from > gethostbyaddr which, from <netdb.h> is HOST_NOT_FOUND. > Again, guessing, I would speculate that wherever 192.168.56.1 is defined is > the same place as where the groups are defined, and they became inaccessible > for some reason. Well, 192.168.56.1 is no address in our home network and I don't know, why sendmail wants to contact it. > Where are the missing groups defined? Only local, I guess in files (PAM?). > What name service are you using? > If NIS/NIS+/LDAP, are all the configured servers/replicas still running? Not configured > Did somebody delete these entries from the name service? > Can any other hosts which use the same name service resolve these > entries? e.g. Does "getent hosts 192.168.56.1" return anything? no > What are the nsswitch.conf entries for hosts: and group: (and possibly > netgroup: if you're using it). passwd: files group: files hosts: files dns Martin
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