dns firewalls and mx records for internally hosted domains

[hanasaki <hanasaki@hanaden.com>]

All,

Sometime ago this list, or the security list, provided a common 
consensus that www servers hosted inside a firewall, and serving pages 
to both inside and outside should have resolve www.domain.com to the 
internal IP for those inside the firewall.  This requires a dns record 
for the domain on the internal dns servers and works like a champ!

It also seems to be causing issues with email sent to the domain from 
inside the firewall.  All mail, sent from inside, is generating an 
"unroutable address" error.