<?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)>