Edit File: xmail.dtd
<?xml version="1.0" encoding="ISO-8859-1"?> <!ENTITY lt "&#60;"> <!ENTITY gt ">"> <!ENTITY amp "&#38;"> <!ENTITY apos "'"> <!ENTITY quot """> <!ENTITY crlf " "> <!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)>