From 5cbaa4c77a25b9143a7d0452d128c361193d694d Mon Sep 17 00:00:00 2001
From: Andris Reinman <andris@kreata.ee>
Date: Wed, 23 Aug 2017 15:59:40 +0300
Subject: [PATCH] Added Return-Path header in LMTP

---
 lmtp.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lmtp.js b/lmtp.js
index 1fdf9c43..36ea7e36 100644
--- a/lmtp.js
+++ b/lmtp.js
@@ -142,7 +142,7 @@ const serverOptions = {
 
                 // create Delivered-To and Received headers
                 let header = Buffer.from(
-                    'Delivered-To: ' + recipient + '\r\n'
+                    ['Delivered-To: ' + recipient, 'Return-Path: <' + (sender || '') + '>'].join('\r\n') + '\r\n'
                     //+ 'Received: ' + generateReceivedHeader(session, queueId, os.hostname().toLowerCase(), recipient) + '\r\n'
                 );