&gt; To this day, if you begin a plain text email message with the word &quot;From&quot;, you&#x27;ll confuse mail programs […]<p>RFC 5322:<p>&gt; […] The body is simply a sequence of
&gt; characters that follows the header section and is separated from the
&gt; header section by an empty line (i.e., a line with nothing preceding
&gt; the CRLF).<p>What brain dead mail program interprets anything after the first empty line as a header?