i had do sys-unconfig for my v890 sparc and had config for eri0 network interface and hostname but after the server bring up i got this error messages :
NIS domainname is www.USSDGmdn-4.com
starting rpc services: rpcbind keyserv done.
Setting netmask of eri0 to 255.255.255.0
Setting default IPv4 interface for multicast: add net 224.0/4: gateway USSDGmdn-4
syslog service starting.
Print services started.
volume management starting.
Oct 11 14:25:53 USSDGmdn-4 sendmail[236]: My unqualified host name (USSDGmdn-4) unknown; sleeping for retry
The system is ready.
If you aren't using DNS at all, then your issue will be with Sendmail. Sendmail by default uses DNS. You can look at Sendmail's FAQ for info on setting up sendmail not to use DNS.