[exim] request help with nis user lookups

hello:

i'm a new exim user and i'm having the following problem.

my users information is accessed through nis.

i have tried using the recommended stanza in the archives

data = ${lookup {$local_part} nis {passwd}{}}

but it doesn't work for me. the router is declined.

however, if i try it like this:

data = ${lookup {$local_part} nis {passwd.byname}}

exim is able to talk to nis, but it gets the complete line from
the passwd file. at that point exim reports an error with the lookup.

is there a way i can break down the output of this query into fields
and populate the needed variables for exim?



thanx

carlos montana