SMTP steup
 

I am running a business which has a linux server (red hat 7).
I would like to open port 25 and use it to receive e-mail into the smtp server. (this I know how to do)
What is my problem:
the server has a domain "myserver.loc" with various user accounts. it can send and recieve email addressed somebody@myserver.loc.
Once I open the SMTP port I would also like it to route messages to 'somebody' which are sent to "domainname.com"
I tried to just open the port and change the MX record, but all mail gets rejected because the server does not "relay"
any ideas?
BTW, I have only telnet access, so please help with commands (I'm just beyond newbie status)

i spent HOURS, and HOURS on this
AND, i did get it to work....(i think)
(redhat 8.0, sendmail 8.12.8)
this ONE page, made all the difference:
http://www.ists.dartmouth.edu/IRIA/k...ssh-how-to.htm

good luck... it was a BEAR........