    # File lib/vmail/message_formatter.rb, line 68
        def find_text_or_html_part(parts = @mail.parts)
          if parts.empty?
            return @mail
          end
          part = parts.detect {|part| part.multipart?}
          if part
            find_text_or_html_part(part.parts)
          else
            # no multipart part
            part = parts.detect {|part| (part.header["Content-Type"].to_s =~ /text\/plain/) }
            if part
              return part
            else
              parts.first
            end
          end
        end