From de0f8389506656fc2a44fc9e3f44886bad71f90c Mon Sep 17 00:00:00 2001
From: Son <son@son>
Date: Mon, 25 Oct 2021 10:36:50 +0200
Subject: [PATCH] ignore hotmail bounce that uses 'Undisclosed recipients:;' in
 :To header

---
 email_handler.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/email_handler.py b/email_handler.py
index 5d3245e0..3ec9edd8 100644
--- a/email_handler.py
+++ b/email_handler.py
@@ -1373,7 +1373,13 @@ def handle_hotmail_complaint(msg: Message) -> bool:
         LOG.e("cannot find the alias")
         return False
 
-    _, alias_address = parse_full_address(get_header_unicode(to_header))
+    try:
+        _, alias_address = parse_full_address(get_header_unicode(to_header))
+    except ValueError:
+        # to_header can be something like 'Undisclosed recipients:;'
+        LOG.w("cannot parse %s", to_header)
+        return False
+
     alias = Alias.get_by(email=alias_address)
 
     if not alias: