[plug] sendmail error

[Jon L. Miller]

I was checking he logs of a client and notice they were having this problem.  
None of the users could send mail 

sendmail[1714]: g4O8OIi01714: ruleset=check_rcpt, 
arg1=<info at mmtnetworks.com.au>, relay=[192.168.0.54], reject=550 5.7.1 
<info at mmtnetworks.com.au>... Relaying denied. IP name lookup failed 
[192.168.0.54]

I have in their access file
localhost
192.168.0.0    RELAY 
and in their local-host-names file 
localhost
<domainname> 

Also when I restart sendmail I get the following error:
Starting sendmail: make: Entering directory `/etc/mail'
make: *** No rule to make target `virtusertable', needed by 
`virtusertable.db'.  Stop.
make: Leaving directory `/etc/mail'

TIA