Fix additional_message_headers plugin compatibility with Mail_Mime >= 1.9 (#1490657)

CHANGELOG

@@ -22,6 +22,7 @@ CHANGELOG Roundcube Webmail
 - Fix bug where Archive/Junk buttons were not active after page jump with select=all mode (#1490647)
 - Fix bug in long recipients list parsing for cases where recipient name contained @-char (#1490653)
 - Plugin API: Added addressbook_export hook
+- Fix additional_message_headers plugin compatibility with Mail_Mime >= 1.9 (#1490657)
 
 RELEASE 1.2-beta
 ----------------

plugins/additional_message_headers/additional_message_headers.php

@@ -24,22 +24,14 @@ class additional_message_headers extends rcube_plugin
     {
         $this->load_config();
 
-        $headers = $args['message']->headers();
-        $rcube   = rcube::get_instance();
+        $rcube = rcube::get_instance();
 
         // additional email headers
         $additional_headers = $rcube->config->get('additional_message_headers', array());
-        foreach ((array)$additional_headers as $header => $value) {
-            if (null === $value) {
-                unset($headers[$header]);
-            }
-            else {
-                $headers[$header] = $value;
-            }
-        }
 
-        $args['message']->_headers = array();
-        $args['message']->headers($headers);
+        if (!empty($additional_headers)) {
+            $args['message']->headers($additional_headers, true);
+        }
 
         return $args;
     }

plugins/additional_message_headers/composer.json

@@ -3,7 +3,7 @@
     "type": "roundcube-plugin",
     "description": "Very simple plugin which will add additional headers to or remove them from outgoing messages.",
     "license": "GPLv2",
-    "version": "1.2.0",
+    "version": "1.2.1",
     "authors": [
         {
             "name": "Ziba Scott",