Some lists are hosted elsewhere. Many are high-traffic. All of them prefer you make an attempt to check the archives before posting a question. Some search sites for specific lists are listed following the mailing lists themselves. Eazel host several lists of which the Nautilus list is a particularly useful one to know about.
Debian users can head for several Debian mailing lists on the Debian website .
Mandrake users can head for several Mandrake mailing lists on the Mandrake website . Caldera users can head for several Caldera mailing lists on the Caldera website . The best place for newbie questions is the freebsd-questions list. XFree86 lists at the XFree86 website . The newbie list is described as being for general XFree86 setup and configuration problems.