ss-from.</p>
</dd>
<dt class="hdlist1">--[no-]thread</dt>
<dd>
<p>If this is set, the In-Reply-To and References headers will be
added to each email sent.  Whether each mail refers to the
previous email (<code>deep</code> threading per <em>git format-patch</em>
wording) or to the first email (<code>shallow</code> threading) is
governed by "--[no-]chain-reply-to".</p>
<div class="paragraph">
<p>If disabled with "--no-thread", those headers will not be added
(unless specified with --in-reply-to).  