--- old/reporting/includes/class.mail.inc    Mon Sep 29 21:21:28 2014
+++ new/reporting/includes/class.mail.inc    Tue Feb 03 12:30:19 2015
@@ -97,6 +97,8 @@
         if ($filename == $file . '.zip') return 'application/x-zip-compressed';
         $file = basename($filename, '.pdf');
         if ($filename == $file . '.pdf') return 'application/pdf';
+        $file = basename($filename, '.xls');
+        if ($filename == $file . '.xls') return 'application/vnd.ms-excel';
         $file = basename($filename, '.csv');
         if ($filename == $file . '.csv') return 'application/vnd.ms-excel';
         $file = basename($filename, '.tar');
@@ -114,31 +116,17 @@
 
     function send()
     {
-        // CC Empfänger hinzufügen
-        $max = count($this->cc);
-        if ($max > 0)
-        {
-            $this->header .= "Cc: ".$this->cc[0];
-            for ($i = 1; $i < $max; $i++)
-            {
-                $this->header .= ", ".$this->cc[$i];
-            }
-            $this->header .= "\n";
-        }
-        // BCC Empfänger hinzufügen
-        $max = count($this->bcc);
-        if ($max > 0)
-        {
-            $this->header .= "Bcc: ".$this->bcc[0];
-            for ($i = 1; $i < $max; $i++)
-            {
-                $this->header .= ", ".$this->bcc[$i];
-            }
-            $this->header .= "\n";
-        }
+        // Add CC Recipients
+        if (!empty($this->cc))
+            $this->header .= "Cc: " . implode(", ", $this->cc) . "\n" ;
+
+        // Add BCC Recipients
+        if (!empty($this->bcc))
+            $this->header .= "Bcc: " . implode(", ", $this->bcc) . "\n" ;
+
         $this->header .= "Content-Type: multipart/mixed;\n boundary=\"$this->boundary\"\n";
 
-        // Attachment hinzufügen
+        // Add Attachments
         $max = count($this->attachment);
         if ($max > 0)
         {