Just wondering why in my tcpdump I keep seeing 

14.21.23.908212 192.168.1.2.32768 > mail.daxstudios.com 3+ (36) (DF)

and other similar settings..

I have never accessed this fromthe NetBSD box, but I keep seeing it...

also after adding the other line to ipnat.conf the mac can still telnet 
to the NetBSD box, the NetBSD box can still ping the mac

a ifconfig -m sn0 shows

sn0 flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
     inet 216.164.32.41 netmask 0xffffff00 broadcast 216.164.32.255

ipnat -s shows

mapped    in   0    out  0
added     0    expired   0
inuse     0
rules     0

ipnat -l shows

List of active MAP/Redirect filters:

List of active sessions:

So I think it is safe to say that ipnat isn't working correctly, no?

Regards,

Greg