From 7c55c5c44a683f5a71e3918f59792a020e351e3b Mon Sep 17 00:00:00 2001
From: Son NK <>
Date: Mon, 11 May 2020 10:21:44 +0200
Subject: [PATCH] return 250 instead of 451 when SPF fails

---
 email_handler.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/email_handler.py b/email_handler.py
index 6c76b4db..b7fad61f 100644
--- a/email_handler.py
+++ b/email_handler.py
@@ -483,7 +483,8 @@ def handle_reply(envelope, smtp: SMTP, msg: Message, rcpt_to: str) -> (bool, str
     if ENFORCE_SPF and mailbox.force_spf:
         ip = msg[_IP_HEADER]
         if not spf_pass(ip, envelope, mailbox, user, alias, contact.website_email, msg):
-            return False, "451 SL E11"
+            # cannot use 4** here as sender will retry. 5** because that generates bounce report
+            return True, "250 SL E11"
 
     delete_header(msg, _IP_HEADER)