smail (sendmail) setup

I've my Linux box on the local network (genx) inside the firewall and I've a mail server(polaris) sitting outside the firewall. Assuming I have access to polaris through the firewall, how do I setup my 'smail' on genx so that it
can use polaris to communicate with the outside world (only for sending mails). There is NO DNS server and host lookup is all done through either the 'yp' NIS services or the /etc/hosts file on each individual machine. (I'm trying to use elm for email, if that matters).
I'm running RH4.2, kernel 2.0.30 on a Cyrix-150MHz with 96M RAM and 72M swap. And smail-3.2.0.92-1, elm-2.4.25-7.

Any suggestions ?
Nishi

My /etc/smail/config has
domains=nspco.com
#auth_domains=mydomain.com
#uucp_name=myuucpname
#more_hostnames=mydomain.com
#smart_transport=uux            # transport
#smart_path=uunet               # smart host's uucp name
smart_transport=smtp
smart_path=polaris               # smart host's hostname
#smart_user=root                 # Forward to another user
#smart_user=$user@mailhub.mydomain.com  # Forward to same user at another host
#visible_name=mydomain.com

/etc/hosts has
151.215.180.139 genx    genx.nspco.com              #mail client
151.215.163.13  polaris polaris.nspco.com nspco.com #mail host

/etc/resolv.conf has
domain nspco.com
search nspco.com
nameserver polaris.nspco.com
nkapoorAsked:
Who is Participating?
 
hpaulConnect With a Mentor Commented:
1. Turn dns off in the services files if you haven't already done
   so.
2. Compile and install sendmail-8.9.1
3. Put the following two lines into a file called nkapoor.mc
OSTYPE(linux)dnl
define(`SMART_HOST', `polaris.nspco.com')dnl
4. Run the following command:
m4 sendmail-8.9.1/cf/m4/cf.m4 nkapoor.mc > /etc/sendmail.cf
5. start sendmail
6. Let me know how it works.
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nkapoorAuthor Commented:
Any takers? I'm willing to raise the points even further !!
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hpaulCommented:
I'm not sure how to do it in smail, but I could probably manage in sendmail.  Let me know if you want me to give it a shot.
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nkapoorAuthor Commented:
sendmail would also be fine. PLease go for it.
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nkapoorAuthor Commented:
Excuse my ignorance but how do you turn DNS on/off ?

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