on top of configuring sendmail, I went ahead and registered <benetleilax.homedns.org> with http://www.dyndns.com/, and will also work on changing the hostname.
It appears to be a configuration with sendmail which is causing the error message with rss2email? Can I use the google smtp server? It requires a password, so I'm thinking not. I need to also configure for my ISP's mail server? Ok.
-Thufir