Mail class? Anbefalet af Tipsen!

Jeg har forsøgt at bruge en mail class, som jeg læste at Tipsen anbefalede i tilfælde, hvor PHP skal udsende mange emails.
Scriptet findes på denne side: http://www.zend.com/codex.php?id=347&single=1

Herunder kan I se det script, som jeg har forsøgt at køre, men uden held. Der bliver skrevet en fin logfil, hvor det ikke ser ud til at noget er galt, men der kommer ikke nogen mails til mig!
Er der nogen her (evt. Tipsen) som kan fortælle hvordan jeg får det til at du! Mit eget gæt er, at jeg skal specificere en mailserver!





<?php
class smtp_client {
    var $connection;
    var $server;
    var $elog_fp;
    var $log_file='./smtp_client.log';
    var $do_log=true;


    // default constructor
    function smtp_client($server='') {
        if (!$server) $this->server="localhost";
        else $this->server=$server;
       
        $this->connection = fsockopen($this->server, 25);
        if ($this->connection <= 0) return 0;

        $this->elog(fgets($this->connection, 1024));
        $this->elog("HELO xyz\r\n", 1);
        fputs($this->connection,"HELO xyz\r\n");
        $this->elog(fgets($this->connection, 1024));
        }

    function email($from_mail, $to_mail, $to_name, $header, $subject, $body) {
        if ($this->connection <= 0) return 0;
   
        $this->elog("MAIL FROM:$from_mail", 1);
        fputs($this->connection,"MAIL FROM:$from_mail\r\n");
        $this->elog(fgets($this->connection, 1024));

        $this->elog("RCPT TO:$to_mail", 1);
        fputs($this->connection, "RCPT TO:$to_mail\r\n");
        $this->elog(fgets($this->connection, 1024));

        $this->elog("DATA", 1);
        fputs($this->connection, "DATA\r\n");
        $this->elog(fgets($this->connection, 1024));

        $this->elog("Subject: $subject", 1);
        $this->elog("To: $to_name", 1);
        fputs($this->connection,"Subject: $subject\r\n");
        fputs($this->connection,"To: $to_name\r\n");

        if ($header) {
            $this->elog($header, 1);
            fputs($this->connection, "$header\r\n");
            }

        $this->elog("", 1);
        $this->elog($body, 1);
        $this->elog(".", 1);
        fputs($this->connection,"\r\n");
        fputs($this->connection,"$body \r\n");
        fputs($this->connection,".\r\n");
        $this->elog(fgets($this->connection, 1024));

        return 1;
        }


    function send() {
        if ($this->connection) {
            fputs($this->connection, "QUIT\r\n");
            fclose($this->connection);
            $this->connection=0;
            }
        }

    function close() { $this->send(); }


    function elog($text, $mode=0) {
        if (!$this->do_log) return;

        // open file
        if (!$this->elog_fp) {
            if (!($this->elog_fp=fopen($this->log_file, 'a'))) return;
            fwrite($this->elog_fp, "\n-------------------------------------------\n");
            fwrite($this->elog_fp, " Sent " . date("Y-m-d H:i:s") . "\n");
            fwrite($this->elog_fp, "-------------------------------------------\n");
            }

        // write to log
        if (!$mode) fwrite($this->elog_fp, "    $text\n");
        else fwrite($this->elog_fp, "$text\n");
        }
    }

?>


<?php
$from = 'postmaster@halstania.dk';
$to[] = 'admin@halstania.dk';
$to_name[] = 'Administrator';
$header[] = '';
$subject[] = 'Test1';
$body[] = 'Dette er en test af admin@halstania.dk';

$smtp = new smtp_client();
$smtp->email($from, $to[0], $to_name[0], $header[0], $subject[0], $body[0]);
$smtp->send(); 
?>