Hallo,
versuch's doch mal so:
/******************** logfile ********************/
$fp = @fopen("/logfile.txt","a");
$logtext = "";
$logtext .= $empfaenger."\n";
$logtext .= $betreff."\n";
$logtext .= $nachricht."\n\n";
@fwrite($fp,$logtext,strlen($logtext));
@fclose($fp);
Grüße,
Sebastian