On Wed, 24 Oct 2018, Rich Shepard wrote:

On Wed, 24 Oct 2018, Paul Heinlein wrote:

 There's nothing special about the List-Id header; it's just something that
 Mailman inserts into outbound messages. Perhaps other list managers use it
 as well.

 Open a list message in Alpine and press the H key to see the full headers.
 You should be able to spot that header if it's there. If not, the
 osgeo.org list server may have another header that procmail can spot.

Paul,

 Yep, it's there all right.

I was thinking of using the subject line tag associated with that list:
Subject: [GRASS-user]
because I was not familiar with all recipe options for procmail.

All procmail does is run a case-insensitive egrep regular expression against your inbound messages. By default, the regex is run only against the mail headers, though procmail recipes can grep the message body as well if you'd like.

The reason I like grep-ing the List-Id header is that, for instance, personal replies to list messages will end up in my inbox rather than in the list folder.

If you choose to match the Subject: header, make sure your rule is flexible enough to match reply (re:, Re:, etc) strings prior to the group name. See, for instance, the Subject: header in this message.

--
Paul Heinlein
[email protected]
45°38' N, 122°6' W
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