I am not sure how to go about it and how it is done.. I am wanting to have a file called Gateway and it this file will have a c class ip address/s ie.. 10.10.101
when sendmail reads this file it will allow all the computers/servers within that c class to post to it.. ie.. like normal users sending mail to a mail server. How this is done.. I have seen it before but did not take in how it was done..
