[CentOS] Sendmail forwarding external email sent to root

Hello:

On a CentOS5 machine I set up for a client, in /etc/aliases, I set root's mail to forward to my email address so I can get notices from cron, etc.

Unfortunately, I am now getting a lot of spam which is sent to root@theservername.com

How can I tell sendmail to not accept external email to root?

I searched the Internet and found some horribly convoluted solutions. There has to be a simple way to do this, like putting a line in sendmail.mc or something.

Anyone know a good solution?

Thanks Neil

-- Neil Aggarwal, (832)245-7314, www.JAMMConsulting.com Eliminate junk email and reclaim your inbox. Visit http://www.spammilter.com for details.