1 - sendmail
function sendmail($to,$subject='message',$msg,$from=null,$format='text/plain'){
	$r="\r\n";$header='';
	$msg=wordwrap($msg, 70,$r);
	if ($format!='text/plain'){$msg=htmlspecialchars($msg);}
	if (!empty($from)){$header.='From: '.$from.$r;}
	$header='Content-Type: text/plain; charset="utf-8"'.$r.'Content-Transfer-Encoding: 8bit'.$r.$header;
	return mail($to,$subject,$msg,$header);
}