From c577e1af6a08a35ca4f95fc5266ac2af7eef340f Mon Sep 17 00:00:00 2001
From: Matteo Scaramuccia <moodle@matteoscaramuccia.com>
Date: Sat, 16 Jan 2016 21:12:03 +0100
Subject: [PATCH] MDL-52637 mail: Disabled automatic TLS encryption.

---
 lib/phpmailer/moodle_phpmailer.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/phpmailer/moodle_phpmailer.php b/lib/phpmailer/moodle_phpmailer.php
index b502d4a22a3..b3955ae5a89 100644
--- a/lib/phpmailer/moodle_phpmailer.php
+++ b/lib/phpmailer/moodle_phpmailer.php
@@ -52,6 +52,8 @@ class moodle_phpmailer extends PHPMailer {
         global $CFG;
         $this->Version   = 'Moodle '.$CFG->version;         // mailer version
         $this->CharSet   = 'UTF-8';
+        // MDL-52637: Disable the automatic TLS encryption added in v5.2.10 (9da56fc1328a72aa124b35b738966315c41ef5c6).
+        $this->SMTPAutoTLS = false;
 
         if (!empty($CFG->smtpauthtype)) {
             $this->AuthType = $CFG->smtpauthtype;