Be more tolerant when splitting strings + remove col that we don't have a label for

config/main.inc.php.dist

@@ -117,7 +117,7 @@ $rcmail_config['smtp_log'] = TRUE;
 $rcmail_config['sendmail_delay'] = 0;
 
 // These cols are shown in the message list. Available cols are:
-// subject, from, to, cc, replyto, date, size, encoding, flag, attachment
+// subject, from, to, cc, replyto, date, size, flag, attachment
 $rcmail_config['list_cols'] = array('subject', 'from', 'date', 'size', 'flag', 'attachment');
 
 // Includes should be interpreted as PHP files

program/steps/mail/func.inc

@@ -136,7 +136,7 @@ function rcmail_message_list($attrib)
   if (empty($attrib['columns']))
       $a_show_cols = is_array($CONFIG['list_cols']) ? $CONFIG['list_cols'] : array('subject');
   else
-      $a_show_cols = explode(',', strip_quotes($attrib['columns']));
+      $a_show_cols = preg_split('/[\s,;]+/', strip_quotes($attrib['columns']));
 
   // store column list in a session-variable
   $_SESSION['list_columns'] = $a_show_cols;