[root@ns1 var]# nslookup 192.168.0.2 Server: 192.168.0.2 Address: 192.168.0.2#53 2.0.168.192.in-addr.arpa name = ns1.errorz.net. [root@ns1 var]# nslookup 192.168.0.3 Server: 192.168.0.2 Address: 192.168.0.2#53 3.0.168.192.in-addr.arpa name = s2.fracter.net. [root@ns1 var]# nslookup 192.168.0.4 Server: 192.168.0.2 Address: 192.168.0.2#53 4.0.168.192.in-addr.arpa name = s4.fraxture.net. [root@ns1 var]# nslookup 192.168.0.5 Server: 192.168.0.2 Address: 192.168.0.2#53 5.0.168.192.in-addr.arpa name = s6.fracter.net. [root@ns1 var]# nslookup 192.168.0.6 Server: 192.168.0.2 Address: 192.168.0.2#53 6.0.168.192.in-addr.arpa name = s8.fracter.net. [root@ns1 var]# nslookup 192.168.0.8 Server: 192.168.0.2 Address: 192.168.0.2#53 8.0.168.192.in-addr.arpa name = charonia.fracter.net. 8.0.168.192.in-addr.arpa name = fd.errorz.net. 8.0.168.192.in-addr.arpa name = ammonite.errorz.net. [root@ns1 var]# nslookup 192.168.0.10 Server: 192.168.0.2 Address: 192.168.0.2#53 10.0.168.192.in-addr.arpa name = dead.fraxture.net. [root@ns1 var]# nslookup 192.168.0.13 Server: 192.168.0.2 Address: 192.168.0.2#53 13.0.168.192.in-addr.arpa name = s13.fraxture.net. [root@ns1 var]# nslookup ns1.errorz.net Server: 192.168.0.2 Address: 192.168.0.2#53 Name: ns1.errorz.net Address: 192.168.0.2 [root@ns1 var]# nslookup s2.fracter.net Server: 192.168.0.2 Address: 192.168.0.2#53 Name: s2.fracter.net Address: 192.168.0.3 [root@ns1 var]# nslookup fraxture.net Server: 192.168.0.2 Address: 192.168.0.2#53 Name: fraxture.net Address: 192.168.0.4 [root@ns1 var]# nslookup s6.fracter.net Server: 192.168.0.2 Address: 192.168.0.2#53 Name: s6.fracter.net Address: 192.168.0.5 [root@ns1 var]# nslookup s8.fracter.net Server: 192.168.0.2 Address: 192.168.0.2#53 Name: s8.fracter.net Address: 192.168.0.6 [root@ns1 var]# nslookup fd.errorz.net Server: 192.168.0.2 Address: 192.168.0.2#53 Name: fd.errorz.net Address: 192.168.0.8 [root@ns1 var]# nslookup dead.fraxture.net Server: 192.168.0.2 Address: 192.168.0.2#53 Name: dead.fraxture.net Address: 192.168.0.10 [root@ns1 var]# nslookup s13.fraxture.net Server: 192.168.0.2 Address: 192.168.0.2#53 Name: s13.fraxture.net Address: 192.168.0.13 [root@ns1 var]# mailq -Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient------- ADAD7378438 2537 Wed Apr 8 05:02:16 camel@errorz.net (host auth.gate-on.net[987.65.43.21] said: 450 : Helo command rejected: Host not found (in reply to RCPT TO command)) yattoko@tonkachi.co.jp -- 2 Kbytes in 1 Request. [root@ns1 var]# mailq | wc 6 37 354 [root@ns1 var]# postsuper -d ALL postsuper: Deleted: 1 message [root@ns1 var]# mailq | wc 1 4 20 [root@ns1 var]#