Try fixing Django6.0

Author: pfouque

django_mailbox/models.py

@@ -7,6 +7,7 @@
 from email.encoders import encode_base64
 from email.message import Message as EmailMessage
 from email.utils import formatdate, parseaddr
+from email.policy import compat32
 from urllib.parse import parse_qs, unquote, urlparse
 from quopri import encode as encode_quopri
 from io import BytesIO
@@ -437,12 +438,9 @@ def _process_message(self, message):
             return None
         msg.set_body(body)
         if message['in-reply-to']:
-            try:
-                msg.in_reply_to = Message.objects.filter(
-                    message_id=message['in-reply-to'].strip()
-                )[0]
-            except IndexError:
-                pass
+            msg.in_reply_to = Message.objects.filter(
+                message_id=message['in-reply-to'].strip()
+            ).first()
         msg.save()
         return msg
 
@@ -674,9 +672,11 @@ def reply(self, message):
         message.extra_headers['Date'] = formatdate()
         message.extra_headers['In-Reply-To'] = self.message_id.strip()
         message.send()
+
         return self.mailbox.record_outgoing_message(
             email.message_from_string(
-                message.message().as_string()
+                message.message().as_string(),
+                policy=compat32,
             )
         )
 

setup.cfg

@@ -2,3 +2,8 @@
 norecursedirs=env docs lib .eggs
 DJANGO_SETTINGS_MODULE=django_mailbox.tests.settings
 addopts = --tb=short -rxs
+
+[tool:pytest]
+norecursedirs=env docs lib .eggs
+DJANGO_SETTINGS_MODULE=django_mailbox.tests.settings
+addopts = --tb=short -rxs