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(gnus)Filtering New Groups

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Filtering New Groups
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   A nice and portable way to control which new newsgroups should be
subscribed (or ignored) is to put an "options" line at the start of the
`.newsrc' file.  Here's an example:

     options -n !alt.all !rec.all sci.all

   This line obviously belongs to a serious-minded intellectual
scientific person (or she may just be plain old boring), because it
says that all groups that have names beginning with `alt' and `rec'
should be ignored, and all groups with names beginning with `sci' should
be subscribed.  Gnus will not use the normal subscription method for
subscribing these groups.  `gnus-subscribe-options-newsgroup-method' is
used instead.  This variable defaults to
`gnus-subscribe-alphabetically'.

   If you don't want to mess with your `.newsrc' file, you can just set
the two variables `gnus-options-subscribe' and
`gnus-options-not-subscribe'.  These two variables do exactly the same
as the `.newsrc' `options -n' trick.  Both are regexps, and if the new
group matches the former, it will be unconditionally subscribed, and if
it matches the latter, it will be ignored.

   Yet another variable that meddles here is
`gnus-auto-subscribed-groups'.  It works exactly like
`gnus-options-subscribe', and is therefore really superfluous, but I
thought it would be nice to have two of these.  This variable is more
meant for setting some ground rules, while the other variable is used
more for user fiddling.  By default this variable makes all new groups
that come from mail back ends (`nnml', `nnbabyl', `nnfolder', `nnmbox',
and `nnmh') subscribed.  If you don't like that, just set this variable
to `nil'.

   New groups that match this regexp are subscribed using
`gnus-subscribe-options-newsgroup-method'.