Can anyone instruct me How to install a linux local mail server...The thing is our office has four branches, we hav our own mail server in USA.. Now i have to set up a local main server in my Head Office.All the mails from the branch office has to come to my local mail server through the USA server.But if anyone of head office people sendmail with in the HO the mail has to reach the local mail server and forward it to the concern person.The samething if he mails to the branch office means it has to come to the local mail server then to USA server then it has to reach the branch office.
Like this i hav to configure a mail server.... Can anyone help its urgent...........