s:</span></dt>
<dd><code><a href="../MessagingException.html" title="class in jakarta.mail">MessagingException</a></code> - for failures</dd>
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<h4>updateHeaders</h4>
<pre class="methodSignature">protected&nbsp;void&nbsp;updateHeaders()
                      throws <a href="../MessagingException.html" title="class in jakarta.mail">MessagingException</a></pre>
<div class="block">Update headers. The default 