All message parts are written to files.  If a
filename is specified for a message part, that filename will be used
when writing the part to a file.  If no filename is specified in the
message, a unique name will be used based upon the content-type of
the message part.
</p>
<p>A single message can be decoded by using the <tt>-single</tt> option.
</p>

Only MHonArc options that affect parsing of mail folders are applicable
for <b>mha-decode</b>.  The following options are applicable:
<tt>-conlen</tt>,
<tt>-mh