I have a situation where there are 2 Linux servers configured with sendmail.
First server is abc.com
Second server is xyz.com
Now these two servers are NOT on the internet.They are connetcing to each other through dedicated Lease Links.
How can I configure both servers so that a user a@abc.com is able to send mail to x@xyz.com. Also the reply from the x@xyz.com should landinthe mailbox of a@abc.com