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Gnus Manual

3.1.2 To From Newsgroups

In some groups (particularly in archive groups), the From header isn't very interesting, since all the articles there are written by you. To display the information in the To or Newsgroups headers instead, you need to decide three things: What information to gather; where to display it; and when to display it.

1. The reading of extra header information is controlled by the gnus-extra-headers. This is a list of header symbols. For instance:

   (setq gnus-extra-headers '(To Newsgroups X-Newsreader))

   This will result in Gnus trying to obtain these three headers, and storing it in header structures for later easy retrieval.

2. The value of these extra headers can be accessed via the gnus-extra-header function. Here's a format line spec that will access the X-Newsreader header:

   "%~(form (gnus-extra-header 'X-Newsreader))@"

3. The gnus-ignored-from-addresses variable says when the `%f' summary line spec returns the To, Newsreader or From header. If this regexp matches the contents of the From header, the value of the To or Newsreader headers are used instead.

A related variable is nnmail-extra-headers, which controls when to include extra headers when generating overview (NOV) files. If you have old overview files, you should regenerate them after changing this variable.

You also have to instruct Gnus to display the data by changing the %n spec to the %f spec in the gnus-summary-line-format variable.

In summary, you'd typically do something like the following:

(setq gnus-extra-headers '(To Newsgroups)) (setq nnmail-extra-headers gnus-extra-headers) (setq gnus-summary-line-format "%U%R%z%I%(%[%4L: %-20,20f%]%) %s\n") (setq gnus-ignored-from-addresses "Your Name Here")

Now, this is mostly useful for mail groups, where you have control over the NOV files that are created. However, if you can persuade your nntp admin to add:

Newsgroups:full

to the end of her `overview.fmt' file, then you can use that just as you would the extra headers from the mail groups.