Issue 9142: Make the message ID look more like a message ID

diff --git a/include/enotify.php b/include/enotify.php
index e8e1357..8b98f90 100644 (file)
--- a/include/enotify.php
+++ b/include/enotify.php
@@ -509,7 +509,8 @@ function notification($params)
                Logger::log('sending notification email');
 
                if (isset($params['parent']) && (intval($params['parent']) != 0)) {
-                       $id_for_parent = $params['parent'] . "@" . $hostname;
+                       $parent = Item::selectFirst(['guid'], ['id' => $params['parent']]);
+                       $message_id = "<" . $parent['guid'] . "@" . gethostname() . ">";
 
                        // Is this the first email notification for this parent item and user?
                        if (!DBA::exists('notify-threads', ['master-parent-item' => $params['parent'], 'receiver-uid' => $params['uid']])) {
@@ -520,13 +521,13 @@ function notification($params)
                                        'receiver-uid' => $params['uid'], 'parent-item' => 0];
                                DBA::insert('notify-threads', $fields);
 
-                               $additional_mail_header .= "Message-ID: <${id_for_parent}>\n";
+                               $additional_mail_header .= "Message-ID: " . $message_id . "\n";
                                $log_msg                = "include/enotify: No previous notification found for this parent:\n" .
                                                          "  parent: ${params['parent']}\n" . "  uid   : ${params['uid']}\n";
                                Logger::log($log_msg, Logger::DEBUG);
                        } else {
                                // If not, just "follow" the thread.
-                               $additional_mail_header .= "References: <${id_for_parent}>\nIn-Reply-To: <${id_for_parent}>\n";
+                               $additional_mail_header .= "References: " . $message_id . "\nIn-Reply-To: " . $message_id . "\n";
                                Logger::log("There's already a notification for this parent.", Logger::DEBUG);
                        }
                }