From b2d4cfa89a9d498f98b5d19ac496cf9f70f92070 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Tue, 09 Feb 2016 03:10:32 -0500
Subject: [PATCH] Fix additional_message_headers plugin compatibility with Mail_Mime >= 1.9 (#1490657)

---
 plugins/additional_message_headers/additional_message_headers.php |   19 ++++++++-----------
 1 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/plugins/additional_message_headers/additional_message_headers.php b/plugins/additional_message_headers/additional_message_headers.php
index c54f77d..58e4d41 100644
--- a/plugins/additional_message_headers/additional_message_headers.php
+++ b/plugins/additional_message_headers/additional_message_headers.php
@@ -15,25 +15,22 @@
  */
 class additional_message_headers extends rcube_plugin
 {
-    public $task = 'mail';
-
     function init()
     {
-        $this->add_hook('message_outgoing_headers', array($this, 'message_headers'));
+        $this->add_hook('message_before_send', array($this, 'message_headers'));
     }
 
     function message_headers($args)
     {
-    	$this->load_config();
+        $this->load_config();
+
+        $rcube = rcube::get_instance();
 
         // additional email headers
-        $additional_headers = rcmail::get_instance()->config->get('additional_message_headers',array());
-        foreach($additional_headers as $header=>$value){
-            if (null === $value) {
-                unset($args['headers'][$header]);
-            } else {
-                $args['headers'][$header] = $value;
-            }
+        $additional_headers = $rcube->config->get('additional_message_headers', array());
+
+        if (!empty($additional_headers)) {
+            $args['message']->headers($additional_headers, true);
         }
 
         return $args;

--
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