just went through the Mailman installation instructions - the Mailman instructions throw a Usage error after the email address and password are entered: Create a new, unpopulated mailing list. Usage: /usr/lib/mailman/bin/newlist [options] [listname [listadmin-addr [admin-password]]] Options: .... Bad owner email address: - owner addresses need to be fully-qualified names like "[email protected]", not just "owner". if i rerun the "newlist mailman" command again manually, and add the email and password, it works fine. not saying it's an instruction issue, but the mailman install isn't working as expected.