code: public static function headerTagger($name = '', $value = '', $adds = array())
      {
          $str = $name.': '.$value;
          if (count($adds)) {
              foreach ($adds as $n=>$v) {
                  $str .= Mailer::$HEADERS_SEPARATOR.($n=='boundary' ? "\n\t" : '').$n."=\"".$v."\"";
              }
          }
          return(trim($str, Mailer::$HEADERS_SEPARATOR));
      }
docs: Build a mail header tag compliant to RFC2822
  
  @param string $name The name of the tag
  @param string $value The value of the tag
  @param array $adds A variable=>value pairs to add to the tag string
  @return string The generated header tag string