sun solaris

error message:
starting rpc services:rpcbindkeyserv failes to generate host’s netname while establishing host’s root key
keyserv done
sndmail:my unqualified hostname(venus.) unknown;sleeping for retry.

please let me know what is the problem..i’m running solaris 2.7 on intel m/c…is it something to do with root security…???
what is netname???