The mime encoding that is used for encoding the headers
[Visual Basic] Public Property HeaderEncoding As EncodingType [C#] public EncodingType HeaderEncoding { get; set; } [C++] public: __property EncodingType get_HeaderEncoding(); public: __property void set_HeaderEncoding(EncodingType ); [JScript] public function get HeaderEncoding() : EncodingType public function set HeaderEncoding(EncodingType);