Domain and organization must be defined before you post your first article, because they are included in all articles you post and will be used for identifying who you are.
Domain is the domain part of your mail address excluding the
local host name. For example, if your mail address is
`umerin@photon.stars.flab.Fujitsu.CO.JP' and the local host name
is `photon', your domain is `stars.flab.Fujitsu.CO.JP'. If
the function system-name of your Emacs returns the full Internet
name, you do not have to define the domain.
Organization is the organization you belong to. It must be defined unless it is defined in the file `/usr/lib/news/organization'.
To define the domain `stars.flab.Fujitsu.CO.JP' and the organization `Fujitsu Laboratories Ltd., Kawasaki, Japan.' using lisp variables, put the following code in `.emacs', `site-init.el' or `default.el'. If you are a system administrator and are installing GNUS for other users, `site-init.el' is the best place to define this because the domain and organization are common to all users of the system.
(setq gnus-your-domain "stars.flab.Fujitsu.CO.JP")
(setq gnus-your-organization
"Fujitsu Laboratories Ltd., Kawasaki, Japan.")
The DOMAINNAME and ORGANIZATION environment variables
are used instead, if defined. To define these variables, put the
following code in `.login'.
setenv DOMAINNAME "stars.flab.Fujitsu.CO.JP" setenv ORGANIZATION "Fujitsu Laboratories Ltd., Kawasaki, Japan."
If the value of the ORGANIZATION environment variable or the
variable gnus-your-organization begins with a slash, it is taken
as the name of a file whose contents are read for the value. If neither
of these is defined, and a file
`~/.organization-distribution' or `~/.organization'
exists, the contents of that file are used. If neither of them does not
exist, and the file `/usr/lib/news/organization' exists, its
contents are used.