mail relay from local to internet

["louie miranda" <louie@chikka.com>]

I have this two mailserver's my 1(mx) connects to the internet directly.
My 2(mx) is in my local lan. I want to achieve that my 2(mx) will use 1(mx)
to
relay and sends email over the internet, recv of email is not my goal just
sending..


Any info's? or ideas..

sendmail + exim, im using..


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thanks,
louie miranda