From 69a5a2c243ed6734df9ef0ad853fa2f0f963b229 Mon Sep 17 00:00:00 2001
From: Antoine Nguyen <tonio@ngyn.org>
Date: Fri, 12 Oct 2018 22:30:22 +0200
Subject: [PATCH] Do not try to decode empty string.

---
 modoboa/lib/email_utils.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modoboa/lib/email_utils.py b/modoboa/lib/email_utils.py
index 2ea160a91..3eb25b9f0 100644
--- a/modoboa/lib/email_utils.py
+++ b/modoboa/lib/email_utils.py
@@ -130,6 +130,8 @@ class Email(object):
         if header in msg:
             decoded_values = []
             for value, encoding in email.header.decode_header(msg[header]):
+                if not len(value):
+                    continue
                 if encoding:
                     value = smart_text(value, encoding=encoding)
                 elif isinstance(value, six.binary_type):