From 5f0930b2912c11b5e7825794d19bc10ee3779292 Mon Sep 17 00:00:00 2001
From: Son NK <>
Date: Sun, 31 Jan 2021 11:50:41 +0100
Subject: [PATCH] handle header is None in get_header_unicode

---
 app/email_utils.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/app/email_utils.py b/app/email_utils.py
index a7f4c0ea..ff722a54 100644
--- a/app/email_utils.py
+++ b/app/email_utils.py
@@ -613,7 +613,10 @@ def get_spam_from_header(spam_status_header, max_score=None) -> (bool, str):
     return spamassassin_answer.lower() == "yes", spam_status_header
 
 
-def get_header_unicode(header: str):
+def get_header_unicode(header: str) -> str:
+    if header is None:
+        return ""
+
     decoded_string, charset = decode_header(header)[0]
     if charset is not None:
         try: