customizing the group parameters or the
@code{gnus-spam-process-newsgroups} variable. When this symbol is
added to a group's @code{spam-process} parameter, the spam-marked
-articles groups will be reported to the Gmane administrators.
+articles groups will be reported to the Gmane administrators via a
+HTTP request.
+
+Gmane can be found at @uref{http://gmane.org}.
+
+@end defvar
+
+@defvar spam-report-gmane-use-article-number
+
+This variable is @code{t} by default. Set it to @code{nil} if you are
+running your own news server, for instance, and the local article
+numbers don't correspond to the Gmane article numbers. When
+@code{spam-report-gmane-use-article-number} is @code{nil},
+@code{spam-report.el} will use the @code{X-Report-Spam} header that
+Gmane provides.
@end defvar