On Friday,  3 January 2003 at 10:10:56 +0000, Ian Watkinson wrote:
> On Thu, 2003-01-02 at 23:39, Greg 'groggy' Lehey wrote:
>> On Thursday,  2 January 2003 at 15:39:07 +0000, Ian Watkinson wrote:
>>> Trying to get Fetmail - Procmail - Exim working.
>>
>> Please don't reply to a thread with a completely different topic.
>
> Thread? Threads are in usenet, this is a mailing list.

Mail uses threads as well.  See RFC 2822.

>> This message is:
>>
>> In-Reply-To: <[EMAIL PROTECTED]>
>>
>
> That's not in my original headers looking at the full headers of the
> message I posted.

Yes, that's there.  That's where I got it from.

>> That is a thread about problems starting X applications.  It makes it
>
> Er, no the subject makes it quite clear it's a post about Procmail and
> Exim, on Freebsd.

No, you replied to a thread on X.  You changed the subject, but you
left in the In-Reply-To: and Reference: headers.

>> really difficult to follow to find a completely unrelated set of
>> messages in the thread.  It also makes it much more difficult to
>> filter with procmail, BTW.
>
> What's wrong with filtering on Subject?

It doesn't show the relationships between the messages.  Look at the
two attachments.

> Can you tell me where the extra header is added,

Most MUAs do it when you reply.  From RFC 2822
(http://www.faqs.org/rfcs/rfc2822.html):

  The "In-Reply-To:" and "References:" fields are used when creating a
   reply to a message.  They hold the message identifier of the
   original message and the message identifiers of other messages (for
   example, in the case of a reply to a message which was itself a
   reply).  The "In-Reply-To:" field may be used to identify the
   message (or messages) to which the new message is a reply, while
   the "References:" field may be used to identify a "thread" of
   conversation.

In your specific case, the headers looked like this after they arrived
here:

  From [EMAIL PROTECTED]  Fri Jan  3 02:11:38 2003
  Return-Path: <[EMAIL PROTECTED]>
  Delivered-To: [EMAIL PROTECTED]
  Received: from mx2.freebsd.org (mx2.freebsd.org [216.136.204.119])
          by wantadilla.lemis.com (Postfix) with ESMTP id BEB2051948
          for <[EMAIL PROTECTED]>; Fri,  3 Jan 2003 02:11:37 +1030 (CST)
  Received: from hub.freebsd.org (hub.freebsd.org [216.136.204.18])
          by mx2.freebsd.org (Postfix) with ESMTP id 0A1C75560B
          for <[EMAIL PROTECTED]>; Thu,  2 Jan 2003 07:41:36 -0800 (PST)
          (envelope-from [EMAIL PROTECTED])
  Received: by hub.freebsd.org (Postfix)
          id D205437B409; Thu,  2 Jan 2003 07:41:35 -0800 (PST)
  Delivered-To: [EMAIL PROTECTED]
  Received: by hub.freebsd.org (Postfix, from userid 538)
          id B28E937B405; Thu,  2 Jan 2003 07:41:34 -0800 (PST)
  Received: from localhost (localhost [127.0.0.1])
          by hub.freebsd.org (Postfix) with SMTP
          id 973AE2E8020; Thu,  2 Jan 2003 07:41:34 -0800 (PST)
  Received: by hub.freebsd.org (bulk_mailer v1.12); Thu, 2 Jan 2003 07:41:34 -0800
  Delivered-To: [EMAIL PROTECTED]
  Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
          by hub.freebsd.org (Postfix) with ESMTP id 1BA1637B401
          for <[EMAIL PROTECTED]>; Thu,  2 Jan 2003 07:41:33 -0800 (PST)
  Received: from clientmail.ehsrealtime.com (eris.ehsrealtime.com [213.52.146.130])
          by mx1.FreeBSD.org (Postfix) with ESMTP id 18D4243ED1
          for <[EMAIL PROTECTED]>; Thu,  2 Jan 2003 07:41:32 -0800 (PST)
          (envelope-from [EMAIL PROTECTED])
  Received: from pan.ehsrealtime.com ([213.52.146.196])
          by clientmail.ehsrealtime.com with esmtp (Exim 3.33 #2)
          id 18U7TM-0007lW-01
          for [EMAIL PROTECTED]; Thu, 02 Jan 2003 15:41:28 +0000
  Subject: Procmail and Exim - Freebsd
  From: Ian Watkinson <[EMAIL PROTECTED]>
  Reply-To: [EMAIL PROTECTED]
  To: [EMAIL PROTECTED]
  In-Reply-To: <[EMAIL PROTECTED]>
  References: <[EMAIL PROTECTED]>
  Content-Type: text/plain
  Organization: EHS Brann
  Message-Id: <[EMAIL PROTECTED]>
  Mime-Version: 1.0
  X-Mailer: Ximian Evolution 1.2.0 
  Date: 02 Jan 2003 15:39:07 +0000
  Content-Transfer-Encoding: 7bit
  Sender: [EMAIL PROTECTED]
  List-ID: <freebsd-questions.FreeBSD.ORG>
  List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
  List-Help: <mailto:[EMAIL PROTECTED]?subject=help> (List Instructions)
  List-Subscribe: <mailto:[EMAIL PROTECTED]?subject=subscribe%20freebsd-questions>
  List-Unsubscribe: 
<mailto:[EMAIL PROTECTED]?subject=unsubscribe%20freebsd-questions>
  X-Loop: FreeBSD.ORG
  Precedence: bulk

The In-Reply_To: and References: headers were almost certainly added
by your MUA.

> and where the posting FAQ is for the list, as I seem to have missed
> the don't reply to the list and change the subject bit..

Try http://www.lemis.com/questions.html.  But this isn't related only
to FreeBSD-questions.  It's a general issue.  Note also that it makes
people less likely to want to reply to them.

>> information in this email is confidential and is intended solely
>> for the addressee(s) and access to this email by anyone else is
>> unauthorised. If you are not the intended recipient then any
>> disclosure, copying, distribution or any action taken or omitted to
>> be taken in reliance on it, is prohibited and may be unlawful.

Please note that all FreeBSD-questions mail is archived and available
on the Web.  You shouldn't be sending confidential mail to it.

Greg
--
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