>Transport protocol name.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>the transport protocol name</dd>
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<dt>Default:</dt>
<dd>""</dd>
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<h4>host</h4>
<pre>java.lang.String&nbsp;host</pre>
<div class="block">Host name for the mail server.</div>
<dl>
<dt><span class="returnLabel">Returns:</span>