diff --git a/library/Zend/Mail/Protocol/Imap.php b/library/Zend/Mail/Protocol/Imap.php
index 90cc258..8c2a7b5 100644
--- a/library/Zend/Mail/Protocol/Imap.php
+++ b/library/Zend/Mail/Protocol/Imap.php
@@ -738,17 +738,23 @@ class Zend_Mail_Protocol_Imap
     /**
      * copy message set from current folder to other folder
      *
-     * @param string   $folder destination folder
-     * @param int|null $to     if null only one message ($from) is fetched, else it's the
-     *                         last message, INF means last message avaible
+     * @param string    $folder destination folder
+     * @param int|array $from   message for items or start message if $to !== null
+     * @param int|null  $to     if null only one message ($from) is fetched, else it's the
+     *                          last message, INF means last message avaible
      * @return bool success
      * @throws Zend_Mail_Protocol_Exception
      */
     public function copy($folder, $from, $to = null)
     {
-        $set = (int)$from;
-        if ($to != null) {
-            $set .= ':' . ($to == INF ? '*' : (int)$to);
+        if (is_array($from)) {
+            $set = implode(',', $from);
+        } else if ($to === null) {
+            $set = (int)$from;
+        } else if ($to === INF) {
+            $set = (int)$from . ':*';
+        } else {
+            $set = (int)$from . ':' . (int)$to;
         }
 
         return $this->requestAndResponse('COPY', array($set, $this->escapeString($folder)), true);