<p>
<var>buffer</var> \e$B$r\e(B message \e$B$H$7$F9=J82r@O$7!"$=$N7k2L$N\e(B mime-entity
\e$B$r\e(B <var>buffer</var> \e$B$N\e(B<code>mime-message-structure</code> \e$B$K3JG<$9$k!#\e(B
<p>
<var>buffer</var> \e$B$,>JN,$5$l$?>l9g!"8=:_$N\e(B buffer \e$B$r9=J82r@O$9$k!#\e(B
<p>
<var>buffer</var> \e$B$r\e(B message \e$B$H$7$F9=J82r@O$7!"$=$N7k2L$N\e(B mime-entity
\e$B$r\e(B <var>buffer</var> \e$B$N\e(B<code>mime-message-structure</code> \e$B$K3JG<$9$k!#\e(B
<p>
<var>buffer</var> \e$B$,>JN,$5$l$?>l9g!"8=:_$N\e(B buffer \e$B$r9=J82r@O$9$k!#\e(B