[mrtg] ping? email

[dbrett at tcn.net]

I went through the archives search for this answer but could not find 
anything useful.

My main objective is to email difference people if something goes down.
i.e. server1 goes down email admin1
      server2 goes down email admin2
I found emails talking about mrtg-ping-probe.  I went to the website for 
mrtg-ping-probe and it does not appear to be available anymore.  I noticed 
somebody else mentioning this as well.

I have MRTG collecting information from different routers and 
switches at this time, now want to add email when servers go down.

What would be the best way to do this?

thanks
david