File Content: xmail.dtd <?xml version="1.0" encoding="ISO-8859-1"?> <!ENTITY lt "&#38;#60;"> <!ENTITY gt "&#62;"> <!ENTITY amp "&#38;#38;"> <!ENTITY apos "&#39;"> <!ENTITY quot "&#34;"> <!ENTITY crlf "&#13;&#10;"> <!ELEMENT email (header+, (body | mimepart+))> <!ELEMENT mimepart (header+, (body | mimepart+))> <!ELEMENT body (#PCDATA)> <!ELEMENT header ((headername|headervalue|parameter)*)> <!ELEMENT headername (#PCDATA)> <!ELEMENT headervalue (#PCDATA)> <!ELEMENT parameter ((paramname|paramvalue)+)> <!ELEMENT paramvalue (#PCDATA)> <!ELEMENT paramname (#PCDATA)> Submit