[Exim] local part with NIS

hello,

I run exim on our server which maintains the connection to Internet.
It's working fine, but I want to know how to do the following.

The server (where exim runs) gets the passwd-file via NIS.
And I want to accept all incoming mail for the users in the NIS-map!
So when the server gets mail, it gotta match the local part with the NIS-db
and if the user is in it, it must accept the mail, if it doesn't not.. (in
fact just the same as the normal operating, except that exim looks the user
up in NIS)

How i got to do this?


Greetings,
Koen Breugelmans