Sleep() with mail()

<?
require_once 'common.php';
//require_once '../lib/editor.php';
require '../lib/template.php';
require_once("../lib/translator.php");

set_time_limit(150);

$translator = new Translator(1);

$sent =(int)$sent;
$id = (int)$id;
$email_template = (int) $email_template;
$email_from = SQLdecode($email_from);
$email_toname = SQLdecode($email_toname);
if(($email_from == "") or (!ereg("^.+@.+\\..+$", $email_from)))
    $email_from = "webmaster@".$SERVER_NAME;

foreach($HTTP_POST_VARS as $sForm => $value) {
        //$postedValue = htmlentities( stripslashes( $HTTP_POST_VARS[$sForm] ) ) ;
        //$postedValue = htmlspecialchars( stripslashes( $HTTP_POST_VARS[$sForm] ) ) ;
            $postedValue = stripslashes( $HTTP_POST_VARS[$sForm] ) ;
            if($sForm=="EditorDefault") $content=$postedValue;
            }
        $contentReal=SQLdecode($content);
        $content=SQLdecode($content);

//$content = $EditorContent1;
$subject = $email_subject;
/// remove slash - wrong preview
if (get_magic_quotes_gpc()){
    $subject = stripslashes($subject);
    $content = stripslashes($content);
}
/*
function mailque($dbconn, $email, $subject, $body, $headers) {
    $body=SQLdecode($body);
    $email=SQLdecode($email);
    $subject=SQLdecode($subject);
    $headers=SQLdecode($headers);

    $SQL = "insert into que (
                            que_email,
                            que_subject,
                            que_body,
                            que_headers
                            )
                            values
                            (
                            '$email',
                            '$subject',
                            '$body',
                            '$headers'
                            )";

    if(!pg_exec($dbconn, $SQL))
        echo "Error at ".$email."<br>";
}
$dbconnmail = pg_connect("host=localhost port=5432 user=maillist dbname=maillist");
*/
// editor staff replace
$content=str_replace("http://".$HTTP_HOST.dirname($PHP_SELF)."/", "", $content);
$content=str_replace("\\\"","\"",$content);
$content=str_replace("&amp;","&",$content);
$content=str_replace("/userimages/","http://".$HTTP_HOST."/userimages/",$content);

// special chars replace
$content=str_replace("€","&euro;",$content);
$content=str_replace("©","&copy;",$content);
$content=str_replace("®","&reg;",$content);
$content=str_replace("™","&#8482;",$content);
$content=str_replace("’","'",$content);
$content=str_replace("–","&#8212;",$content);

if($sent == 1) {
    $subject;
    if (!$id) {
        $new_id = db_getid();
        $SQL = "insert into maillist_email(email_from, email_id, email_template, email_subject, email_html, email_images, email_name, email_date ) values ('".$email_from."',".$new_id.", $email_template, '".SQLDecode($email_subject)."', '".SQLDecode($contentReal)."','".SQLDecode($uploadedImages)."','".SQLDecode($email_name)."', '".date("Y.m.d h:i", strtotime("now"))."')";
        db_exec($DB_LINK, $SQL);
        $id = $new_id;
    }
    $SQLWHERE = " AND (";
    for ($i = 0; $i < count($mlgroup); $i++)
        $SQLWHERE .= ($i > 0 ? " OR " : "").db_concat(array("','", "maillist_group", "','"))." LIKE '%,".$mlgroup[$i].",%'";
    $SQLWHERE .= ")";
    if(count($mlgroup)){
        $SQL = "select distinct UPPER(TRIM(maillist_email)) as mailtosend, max(maillist_name) as finalname from maillist where maillist_active=".db_set_boolean(true)." ".$SQLWHERE." group by mailtosend ";
        $RES1 = db_exec($DB_LINK, $SQL);
        $NR=db_numrows($RES1);
        for($br=0;$br<$NR;$br++){
            if(checkEmail(db_result($RES1, $br, "mailtosend"))){
                $t = new Template("../email_templates", "remove");
                $SQL = "SELECT template_file FROM maillist_template, maillist_email WHERE email_id=".$id." AND email_template=template_id";
                $RS = db_exec(1, $SQL);
                $tf = db_result($RS, 0, "template_file");
                $t->set_file(array("page" => $tf));
                $t->set_var(array(
                "DATE" => date("F d Y", strtotime("now")),
                "NAME" => db_result($RES1, $br, "finalname"),
                "TITLE" => $subject,
                "BODY" => $content,
                "EMAILID"=> $id,
                "HOST" =>"http://".$HTTP_HOST,
                "DEAR" => $translator->translate("DEAR"),
                "Click_here" => $translator->translate("Click_here"),
                "removed_from_maillist" => $translator->translate("removed_from_maillist"),
                "Recomend_to_friend" => $translator->translate("Recomend_to_friend"),
                "EMAIL" => db_result($RES1, $br, "mailtosend")
                ));
                $t->parse("OUT", array("page"));
                $maillist_email =  $t->get_var("OUT");
                mail(db_result($RES1, $br, "mailtosend"), $subject, $maillist_email, "From: $email_from\nContent-Type: text/html;\n charset=utf-8;\n");
                //mailque($dbconnmail, db_result($RES1, $br, "mailtosend"), $subject, $maillist_email, "From: (".$email_from.")\nContent-Type: text/html;\n charset=utf-8;\n");
            }
if ($br>0 && $br%2==0) {sleep(15);}
        }
    }
    if(checkEmail($email_to)){
        $NR++;
        $t1 = new Template("../email_templates", "remove");
            $SQL1 = "SELECT template_file FROM maillist_template, maillist_email WHERE email_id=".$id." AND email_template=template_id";
            $RS1 = db_exec(1, $SQL1);
            $tf = db_result($RS1, 0, "template_file");
            $t1->set_file(array("page" => $tf));
            $t1->set_var(array(
            "DATE" => date("F d Y", strtotime("now")),
            "NAME" => $email_toname,
            "TITLE" => $subject,
            "BODY" => $content,
            "EMAILID"=> $id,
            "HOST" =>"http://".$HTTP_HOST,
            "EMAIL" => $email_to
            ));
            $t1->parse("OUT", array("page"));
            $maillist_email =  $t1->get_var("OUT");
            mail($email_to, $subject, $maillist_email, "From: ($email_from)\nContent-Type: text/html;\n charset=utf-8;\n");
    }
    $resmessage = "Email Sent to ".($NR)." emails";
}

// preview the email
if($sent == 2){
    $t = new Template("../email_templates", "remove");
    $SQL = "SELECT template_file FROM maillist_template WHERE template_id=$email_template";
    $RS = db_exec(1, $SQL);
    $tf = db_result($RS, 0, "template_file");
    $t->set_file(array("page" => $tf));
    $t->set_var(array(
    "DATE" => date("F d Y", strtotime("now")),
    "NAME" => "Sir/Madam",
    "TITLE" => $subject,
    "BODY" => $content,
    "HOST" => "http://".$HTTP_HOST,
    "EMAIL" => ""
    ));
    $t->parse("OUT", array("page"));
    $previewcontent =  $t->get_var("OUT");
    echo $previewcontent;
}

// update in db
if($sent == 3) {
    if($id){
        $SQL = "update maillist_email set email_from='".$email_from."',email_template = $email_template, email_subject = '".SQLDecode($email_subject)."', email_html = '".SQLDecode($contentReal)."', email_images='".SQLDecode($uploadedImages)."', email_date = '".date("Y.m.d h:i", strtotime("now"))."', email_name = '".SQLDecode($email_name)."' where email_id=$id";
        $resmessage = "Email Updated";
    }else{
        $SQL = "insert into maillist_email(email_from,email_id, email_template, email_subject, email_html, email_images, email_name, email_date ) values ('".$email_from."',".db_getid().", $email_template, '".SQLDecode($email_subject)."', '".SQLDecode($contentReal)."','".SQLDecode($uploadedImages)."','".SQLDecode($email_name)."', '".date("Y.m.d h:i", strtotime("now"))."')";
        $resmessage = "Email Added";
    }
    db_exec($DB_LINK, $SQL);
}
db_close();

if($sent != 2 && $sent > 0){
?>
<HTML>
    <HEAD>
    <link rel="stylesheet" href="style.css">
    <TITLE>Message</TITLE>
    </HEAD>
    <BODY bgcolor="#ffffff">
    <table height="100%" border="0" cellpadding="2" cellspacing="1" width="100%" bgcolor="#000000">
    <tr><td>
<?
echo "<center><h3>".$resmessage."</h3><br><br> <input type=button value='OK' onclick='window.close()'></center>";
?>
    </td>
    </tr>
    </TABLE>
    </BODY>
</HTML>
<?
}
?>