...I had a sinking suspicion that the errors I was getting in qmail were related to a connection issue... So I did a ifconfig and found the following. I can connect to 66.13.54.178 mail:~ # ifconfig eth0 Link encap:Ethernet HWaddr 00:02:E3:05:43:7E inet addr:66.13.54.178 Bcast:66.13.54.191 Mask:255.255.255.224 inet6 addr: fe80::2:e305:437e/10 Scope:Link inet6 addr: fe80::202:e3ff:fe05:437e/10 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:485944 errors:0 dropped:0 overruns:0 frame:0 TX packets:482619 errors:1 dropped:0 overruns:1 carrier:1 collisions:0 txqueuelen:100 RX bytes:249460589 (237.9 Mb) TX bytes:101582748 (96.8 Mb) Interrupt:10 Base address:0xd000 eth1 Link encap:Ethernet HWaddr 00:02:E3:20:A1:7A inet addr:10.0.0.1 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::202:e3ff:fe20:a17a/10 Scope:Link inet6 addr: fe80::2:e320:a17a/10 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:441154 errors:26596 dropped:0 overruns:0 frame:43534 > TX packets:439143 errors:539 dropped:0 overruns:0 carrier:1078 collisions:0 txqueuelen:100 RX bytes:96514614 (92.0 Mb) TX bytes:229004306 (218.3 Mb) Interrupt:11 Base address:0xf000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:11 errors:0 dropped:0 overruns:0 frame:0 TX packets:11 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1056 (1.0 Kb) TX bytes:1056 (1.0 Kb) Eth1 seems to betting lots of errors, could this be hardware problems , I don't see any collisions Is there a way to isolate the problem a little more. I was thinking about removing ipv6 from the network cards, and maybe check the run some diags on the card. Has any of you seen something like this?