Configuration of sudoers file

[Eric]

Greetings!

I'm trying to set up sudo to send an email whenever su is run.  Using sendmail 
on the command line I'm able to send myself an email so I know sendmail is 
running ok.  I'm running Suse 8.0.

Here are the lines I've added to the sudoers file:

Defaults:mail_always true
Defaults  mailerpath="/usr/sbin/sendmail"
Deraults  mailto=("eric.linux at t-online.de")

In the samples section of sudoers:

eric linux=NOPASSWD: /the program I want to run

When I invoke su on the command line and give it a bad password no email is 
sent.  Any ideas?

Eric