DynDNS.org
(a dynamic DNS provider)
Granite Canyon
(this site will host your DNS zone for free...your mileage may vary!) [See ZoneEdit below]
Info on the Unix SENDMAIL program
from
NetWork Computing
Magazine
Verio.com
(I obtained a $19/yr. domain name from Verio)
ZoneEdit.com
(Free DNS Service, up to five zones)
