From c41c36acaa5645de756f4ca6a972596b0257573f Mon Sep 17 00:00:00 2001
From: Son NK <>
Date: Mon, 2 Nov 2020 14:53:22 +0100
Subject: [PATCH] set "date" header in forward phase if needed

---
 email_handler.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/email_handler.py b/email_handler.py
index 8923e9cd..932d2213 100644
--- a/email_handler.py
+++ b/email_handler.py
@@ -672,6 +672,10 @@ def forward_email_to_mailbox(
     add_or_replace_header(msg, _MESSAGE_ID, make_msgid(str(email_log.id), EMAIL_DOMAIN))
     add_or_replace_header(msg, _ENVELOPE_FROM, envelope.mail_from)
 
+    if not msg["Date"]:
+        date_header = formatdate()
+        msg["Date"] = date_header
+
     # change the from header so the sender comes from a reverse-alias
     # so it can pass DMARC check
     # replace the email part in from: header