People who are interested in sendmail can go below or else just ignore it I don't want to waste your valuable time.


I want to know sendmail configuration for implementing in a scenario.


I have 5 servers running Redhat Linux.yet i haven't configured SENDMAIL for it to work.My network consists of 400 clients.All this 400 clients should send mails between them and also to internet.Being a new bie to SendMail configuration i couldn't able to implement a roboust mail network.

My question is-- For learning purpose i will use my domain name as LINUX.com. I want to configure (D1) server meaning that DMZ server.the DMZ server should communicate with internet using a static public IP example 150.150.150.150. Other 4 servers named as (L1,L2,L3,L4) meaning that(LAN servers) should communicate with Local clients users computers.LAN servers should contact with (D1) if they have to send mails to internet.
LAN servers should also communicate with each other for sending and recieving local mails.(i.e)inside LINUX.com (L1-L2-L3-L4).
IP address of L1-192.162.1.1
IP address of L1-192.162.1.2
IP address of L1-192.162.1.3
IP address of L1-192.162.1.4

What is configuration changes must be done in default sendmail configuration file in these four LAN servers?
what configuration should be done in D1 machine which should send and recieve mail from internet and to my LAN servers.(L1,L2,L3,L4).
What MX record should be configured in my DNS? Also tell me the DNS configuration.

Regards
pragabalu.