If the variable gnus-use-generic-from is non-nil, the
local host name of your machine will not appear in the `From:'
field of article headers you post. This is called the GENERICFROM
feature in the Bnews system. This may be useful if there are many
workstations connected to each other in a local area network, and
aliases service or automatic forwarding of mail is supported between the
workstations.
To use the GENERICFROM, 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 it because the definition is common to all users of the system having the same domain and organization (see section Domain and Organization).
(setq gnus-use-generic-from t)
As a special case of the GENERICFROM feature, if the variable
gnus-use-generic-from is a string, it is used as your domain
instead of the definition of the environment variable DOMAINNAME
or the variable gnus-your-domain (see section Domain and Organization).