How to make sendmail.cf work on a host behind a firewall. --------------------------------------------------------- # These commands tell sendmail that it *IS* collab.net, no if, ands or # buts! DMcollab.net Dmcollab.net Djcollab.net # Exception: if we now send mail to "foo@collab.net", sendmail will # attempt to deliver to a *local* user named foo, because it thinks # that it *is* collab.net. This is bad! We want all such "local" # mail to be relayed to the real MX host for collab.net: DHlaswell.sp.collab.net # Exception to the exception: any mail arriving to the box addressed # to "sussman@collab.net" will now fall into an infinite loop. Why? # Because the previous rule tries to relay all local addresses. # Therefore, this command says to *ignore* the previous rule for users # root and sussman: CL root sussman