Here is the situation:
Our SGI workstation is using "ppp" to establish connection with our account "peter" at our ISP, and all our networking to/from the Internet is OK. Our PPP Client is assigned IP addresses DUNAMICALLY by the ISP's PPP Server.
Outgoing mail works fine.
Incoming mail (any mail to our domainname "our.domain.com") is successfully spooled by our ISP into "firstname.lastname@example.org".
I use "fetchmail" to get the mail from the ISP's POP3 server, and I distribute MANUALLY (and painfully) the mail to the appropriate recipients (email@example.com, firstname.lastname@example.org, etc).
I would like to configure "sendmail" to pick-up and distribute the mail, as described above.