public function getBoundary($boundaryInd=0) {
		if( empty($this->mimeBoundary[$boundaryInd]) ) {
			$this->mimeBoundary[$boundaryInd] = 'ORPHEUS_'.md5(microtime(1)+$boundaryInd);
// 			$this->MIMEBoundary[$boundaryInd] = '-=%ORPHEUS_'.md5(microtime(1)+$boundaryInd).'%=-';
		}
		return $this->mimeBoundary[$boundaryInd];
	}