tools/perl-5.8.0/doc/MHonArc/faq/threads.html

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<H2><a name="threading">Threading</a></H2>

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<li><a href="#howthreads">How does threading work?</a></li>
<li><a href="#whynotthreads">Why isn't threading working for me?</a></li>
<li><a href="#refsinmua">How can I get my MUA to define the References or In-Reply-To field? </a></li>
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<h3><b><a name="howthreads">How does threading work?</a></b></h3>
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<P>MHonArc utilizes the <CODE>References</CODE> and
<CODE>In-Reply-To</CODE> fields of mail messages for generating
threads. It is up to the mail user agents (MUAs) to define these
fields.  The <CODE>References</CODE> field is normally utilized by
news software, while <CODE>In-Reply-To</CODE> is normally utilized
be e-mail software.  </P>

<p>In v2.0 and later, MHonArc will also check message subjects for
threads.  Hence, if the MUA fails to include the reference message
ID, MHonArc will still group messages of the same subject
together (utilizing the message date for thread order).
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<h3><b><a name="whynotthreads">Why isn't threading working for me?</a></b></h3>
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<P>In versions prior to v2.0, If the mail you archive does not
contain <CODE>References</CODE> and <CODE>In-Reply-To</CODE> fields,
MHonArc will not detect a thread, even though there are
messages that are follow-ups to existing messages.  </P>


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<h3><b><a name="refsinmua">How can I get my MUA to define the References or In-Reply-To field? </a></b></h3>
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<P>The answer varies depending on your MUA. You'll need to look at the
documentation of your MUA to find the answer.
</P>

<P>For MH users, the following in your <CODE>replcomps</CODE> file will work:
</P>

<PRE>%&lt;{date}In-reply-to: Your message of "\
%&lt;(nodate{date})%{date}%|%(pretty{date})%&gt;."%&lt;{message-id}
             %{message-id}%&gt;\n%&gt;\

</PRE>

<P>Or, you can use the following if you prefer the
<CODE>References</CODE> field format: </P>

<PRE>%&lt;{message-id}References: \
%&lt;{references}%(void{references})%(trim)%(putstr) %&gt;
            %(void{message-id})%(trim)%(putstr)\n%&gt;\

</PRE>

<P>Author welcomes feedback from users on how to configure other MUAs.
</P>

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$Date: 2001/12/24 14:38:40 $ <br>
<img align="top" src="monicon.png" alt="">
<a href="http://www.mhonarc.org/"
><strong>MHonArc</strong></a><br>
Copyright &#169; 1997-1999, <a href="http://www.earlhood.com/"
>Earl Hood</a>, <a href="mailto:mhonarc@mhonarc.org"
>mhonarc@mhonarc.org</a><br>
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