[imp] Radius question

[lists]

I know this may not be the right list, but if someone could point me in 
the right direction, it would be great.

Setup

I have a radius server running one serverA
I have a sendmail server running on serverB

Radius server and sendmail server talk to each other on a 
dirty(10.x.x.x/24) network.

I need radius accounts to work with sendmail.  so that if a radius user 
john had email sent to, john@somedomain, it would go thought on the 
sendmail box.  The sendmail box has an NO users on it (other then root). 

Any ideas?

Michael