fix: upgrade django version and all deps

pyproject.toml

@@ -4,15 +4,15 @@ version = "0.1.0"
 requires-python = "==3.12.*"
 
 dependencies = [
-    "Django~=3.2.24",
-    "django-post-office~=3.8.0",
-    "djangorestframework~=3.14.0",
-    "django-rest-knox~=4.2.0",
-    "drf-spectacular~=0.27.1",
-    "gunicorn~=20.1.0",
-    "psycopg2-binary~=2.9.9",
-    "python-dotenv~=0.19.2",
-    "whitenoise~=6.6.0",
+    "Django~=5.2.0",
+    "django-post-office~=3.10.0",
+    "djangorestframework~=3.16.0",
+    "django-rest-knox~=5.0.0",
+    "drf-spectacular~=0.29.0",
+    "gunicorn~=23.0.0",
+    "psycopg2-binary~=2.9.10",
+    "python-dotenv~=1.0",
+    "whitenoise~=6.11.0",
     "pymemcache>=4.0,<5.0",
 ]
 
@@ -25,13 +25,12 @@ packages = ["src/central_command"]
 
 [tool.uv]
 dev-dependencies = [
-    "pre-commit~=4.0",
-    "ruff~=0.7",
-    "mypy>=1.7.1",
-    # TODO: bump django and stubs. these stubs seem to be incompatible with django 3.2
-    # https://github.com/typeddjango/django-stubs/tree/master?tab=readme-ov-file#version-compatibility
-    "django-stubs[compatible-mypy]==4.2.7",
-    "djangorestframework-stubs[compatible-mypy]==3.14.5",
+    "aiosmtpd~=1.4.5",
+    "pre-commit~=4.4",
+    "ruff~=0.14.0",
+    "mypy>=1.18.0",
+    "django-stubs[compatible-mypy]==5.2.7",
+    "djangorestframework-stubs[compatible-mypy]==3.16.5",
 ]
 
 [tool.ruff]

src/accounts/api/views.py

@@ -91,7 +91,7 @@ def post(self, request):
         email = serializer.validated_data["email"]
         password = serializer.validated_data["password"]
 
-        account: Account | None = authenticate(email=email, password=password)  # type: ignore[assignment]
+        account: Account | None = authenticate(email=email, password=password)
 
         if account is None:
             return ErrorResponse(

src/tests/test_post_office_smtp.py

@@ -0,0 +1,71 @@
+import os
+import socket
+import tempfile
+
+from pathlib import Path
+
+from aiosmtpd.controller import Controller
+from django.core.management import call_command
+from django.test import TestCase, override_settings
+from post_office import mail
+from post_office.models import STATUS, Email
+
+
+class _InMemorySMTPHandler:
+    def __init__(self):
+        self.envelopes = []
+
+    async def handle_DATA(self, server, session, envelope):  # noqa: N802 the name is required by aiosmtpd
+        self.envelopes.append(envelope)
+        return "250 OK"
+
+
+def _allocate_port():
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    sock.bind(("127.0.0.1", 0))
+    try:
+        return sock.getsockname()[1]
+    finally:
+        sock.close()
+
+
+class PostOfficeSMTPIntegrationTest(TestCase):
+    def setUp(self):
+        self.smtp_handler = _InMemorySMTPHandler()
+        self.smtp_port = _allocate_port()
+        self.smtp_controller = Controller(self.smtp_handler, hostname="127.0.0.1", port=self.smtp_port)
+        self.smtp_controller.start()
+        self.addCleanup(self.smtp_controller.stop)
+
+    def test_queued_email_is_delivered_via_local_debug_server(self):
+        recipients = ["recipient@example.com"]
+        sender = "sender@example.com"
+        subject = "Queue smoke test"
+        body = "Hello from the queue"
+
+        with override_settings(
+            EMAIL_BACKEND="post_office.EmailBackend",
+            EMAIL_HOST="127.0.0.1",
+            EMAIL_PORT=self.smtp_port,
+            EMAIL_USE_TLS=False,
+            EMAIL_HOST_USER="",
+            EMAIL_HOST_PASSWORD="",
+        ):
+            mail.send(recipients=recipients, sender=sender, subject=subject, message=body)
+
+            self.assertEqual(Email.objects.filter(status=STATUS.queued).count(), 1)
+
+            fd, lockfile_path = tempfile.mkstemp()
+            os.close(fd)
+            try:
+                call_command("send_queued_mail", processes=1, lockfile=lockfile_path, verbosity=0)
+            finally:
+                Path(lockfile_path).unlink()
+
+        sent_emails = Email.objects.filter(status=STATUS.sent)
+        self.assertEqual(sent_emails.count(), 1)
+        self.assertEqual(len(self.smtp_handler.envelopes), 1)
+        envelope = self.smtp_handler.envelopes[0]
+        self.assertEqual(envelope.mail_from, sender)
+        self.assertEqual(envelope.rcpt_tos, recipients)
+        self.assertIn(subject, envelope.content.decode())