<li>’(*)’: HF is often not present (but also further HF may not be present). If the HF is not present, naturally it can neither be taken over nor propagated.</li>
<li>‘(new)’ / ‘(OrigM)’: HF or MIME-HSp is generated depending on the decision in <ahref="#sending-side-step-1"class="xref">Section 4.1.5.1.1</a>, while ‘(new)’ / ‘(OrigM)’ designate the default.</li>
<li>>: taken over / copied from last column</li>
<li>*: HF that is often not present (also further HF may not be present). If a HF is not present, naturally it can neither be taken over nor propagated.</li>
<li>(new) / (OrigM): HF or MIME-HSp is generated depending on the decision in <ahref="#sending-side-step-1"class="xref">Section 4.1.5.1.1</a>, while ‘(new)’ / ‘(OrigM)’ designate the default.</li>