>(1) I am completely baffled by the send mail .cf and .m4 files!
You should download my HOWTO ftp.linux.it /pub/ILS/People/md/Ifmail-HOWTO.tgz).
It's written in Italian, so it will not be much useful to you, but in the
archive there are my m4 macros for ifmail and sendmail 8.8.x.
I have an ifmail+uucp setup too, if you have any problem with sendmail
feel free to ask about.
-- ciao, Marco