diff --git a/CHANGELOG.md b/CHANGELOG.md
index 67e0879..a8164d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ and this project adheres to
 - ⬆️(dependencies) remove unneeded dependencies
 - 🔥(teams) remove pagination of teams listing
 - 🔥(teams) remove search users by trigram
+- 🗃️(teams) remove `slug` field
 
 ### Added
 
@@ -30,10 +31,7 @@ and this project adheres to
 - 🔧(sentry) restore default integrations
 - 🔇(backend) remove Sentry duplicated warning/errors
 - 👷(ci) add sharding e2e tests  #467
-
-### Removed
-
-- 🗃️(teams) remove `slug` field
+- 🐛(dimail) fix unexpected status_code for proper debug #454
 
 ## [1.4.1] - 2024-10-23
 
diff --git a/src/backend/mailbox_manager/tests/api/mailboxes/test_api_mailboxes_create.py b/src/backend/mailbox_manager/tests/api/mailboxes/test_api_mailboxes_create.py
index 7e8bff7..51ed08c 100644
--- a/src/backend/mailbox_manager/tests/api/mailboxes/test_api_mailboxes_create.py
+++ b/src/backend/mailbox_manager/tests/api/mailboxes/test_api_mailboxes_create.py
@@ -13,6 +13,7 @@ from django.utils.translation import gettext_lazy as _
 import pytest
 import requests
 import responses
+from requests.exceptions import HTTPError
 from rest_framework import status
 from rest_framework.test import APIClient
 
@@ -501,8 +502,7 @@ def test_api_mailboxes__user_unrelated_to_domain():
         assert not models.Mailbox.objects.exists()
 
 
-@mock.patch.object(Logger, "error")
-def test_api_mailboxes__handling_dimail_unexpected_error(mock_error):
+def test_api_mailboxes__handling_dimail_unexpected_error(caplog):
     """
     API should raise a clear error when dimail returns an unexpected response.
     """
@@ -527,12 +527,12 @@ def test_api_mailboxes__handling_dimail_unexpected_error(mock_error):
         rsps.add(
             rsps.POST,
             re.compile(rf".*/domains/{access.domain.name}/mailboxes/"),
-            body='{"details": "Internal server error"}',
+            body='{"detail": "Internal server error"}',
             status=status.HTTP_500_INTERNAL_SERVER_ERROR,
             content_type="application/json",
         )
 
-        with pytest.raises(requests.exceptions.HTTPError):
+        with pytest.raises(HTTPError):
             response = client.post(
                 f"/api/v1.0/mail-domains/{access.domain.slug}/mailboxes/",
                 mailbox_data,
@@ -545,10 +545,9 @@ def test_api_mailboxes__handling_dimail_unexpected_error(mock_error):
         assert not models.Mailbox.objects.exists()
 
         # Check error logger was called
-        assert mock_error.called
-        assert mock_error.call_args_list[1][0] == (
-            'Unexpected response from dimail: 500 {"details": "Internal server error"}',
-        )
+        assert len(caplog.records) == 2  # 1 + new empty info. To be investigated
+        assert caplog.records[0].levelname == "ERROR"
+        assert caplog.records[0].message == "[DIMAIL] 500: Internal server error"
 
 
 @mock.patch.object(Logger, "error")
diff --git a/src/backend/mailbox_manager/utils/dimail.py b/src/backend/mailbox_manager/utils/dimail.py
index 49c40b2..ec8773a 100644
--- a/src/backend/mailbox_manager/utils/dimail.py
+++ b/src/backend/mailbox_manager/utils/dimail.py
@@ -1,6 +1,7 @@
 """A minimalist client to synchronize with mailbox provisioning API."""
 
 import ast
+import json
 import smtplib
 from email.errors import HeaderParseError, NonASCIILocalPartDefect
 from email.headerregistry import Address
@@ -13,6 +14,7 @@ from django.template.loader import render_to_string
 from django.utils.translation import gettext_lazy as _
 
 import requests
+from requests.exceptions import HTTPError
 from rest_framework import status
 from urllib3.util import Retry
 
@@ -157,7 +159,7 @@ class DimailAPIClient:
 
     def pass_dimail_unexpected_response(self, response):
         """Raise error when encountering an unexpected error in dimail."""
-        error_content = response.content.decode("utf-8")
+        error_content = json.loads(response.content.decode(response.encoding).replace("'", '"'))
 
         logger.error(
             "[DIMAIL] unexpected error : %s %s", response.status_code, error_content