diff --git a/sage_mailbox/conf.py b/sage_mailbox/conf.py
index 8fedd70..7b92b23 100644
--- a/sage_mailbox/conf.py
+++ b/sage_mailbox/conf.py
@@ -1,22 +1,17 @@
 from django.conf import settings
 
 from sage_mailbox.exc import IMAPConfigurationError
-
-DEFAULTS = {
-    "IMAP_SERVER_DOMAIN": None,
-    "IMAP_SERVER_PORT": 993,
-    "IMAP_SERVER_USER": None,
-    "IMAP_SERVER_PASSWORD": None,
-    "IMAP_DEBUG_ENABLED": True,
-}
+from sage_mailbox.constants import DEFAULTS
 
 
 class IMAPSettings:
+    EXCLUDED_FROM_VALIDATION = ["IMAP_DEBUG_ENABLED"]
+
     def __init__(self):
         self._settings = {}
         for setting, default in DEFAULTS.items():
             value = getattr(settings, setting, default)
-            if value is None and setting not in ["MAILCOW_DEBUG_ENABLED"]:
+            if value is None and setting not in self.EXCLUDED_FROM_VALIDATION:
                 raise IMAPConfigurationError(
                     f"{setting} must be set in your Django settings."
                 )
diff --git a/sage_mailbox/constants.py b/sage_mailbox/constants.py
new file mode 100644
index 0000000..af8f1e9
--- /dev/null
+++ b/sage_mailbox/constants.py
@@ -0,0 +1,8 @@
+
+DEFAULTS = {
+    "IMAP_SERVER_DOMAIN": None,
+    "IMAP_SERVER_PORT": 993,
+    "IMAP_SERVER_USER": None,
+    "IMAP_SERVER_PASSWORD": None,
+    "IMAP_DEBUG_ENABLED": True,
+}