Refs #35514 -- Added error for missing EMAIL_FILE_PATH setting.

Replaced TypeError in `os.path.abspath(None)` with ImproperlyConfigured
error when settings.EMAIL_FILE_PATH is required but missing.

2 files changed, 12 insertions, 0 deletions

diff --git a/django/core/mail/backends/filebased.py b/django/core/mail/backends/filebased.py
index 3b2b037150..07ca959a59 100644
--- a/django/core/mail/backends/filebased.py
+++ b/django/core/mail/backends/filebased.py
@@ -15,6 +15,10 @@ class EmailBackend(ConsoleEmailBackend):
             self.file_path = file_path
         else:
             self.file_path = getattr(settings, "EMAIL_FILE_PATH", None)
+        if self.file_path is None:
+            raise ImproperlyConfigured(
+                "The EMAIL_FILE_PATH setting must be set to use the file EmailBackend."
+            )
         self.file_path = os.path.abspath(self.file_path)
         try:
             os.makedirs(self.file_path, exist_ok=True)
diff --git a/tests/mail/test_backends.py b/tests/mail/test_backends.py
index c0bab41b57..ba1f652b6d 100644
--- a/tests/mail/test_backends.py
+++ b/tests/mail/test_backends.py
@@ -253,6 +253,14 @@ class FileBackendTests(SharedEmailBackendTests, SimpleTestCase):
             backend = filebased.EmailBackend(file_path=file_path_override)
         self.assertEqual(backend.file_path, str(file_path_override))
 
+    def test_error_if_email_file_path_setting_not_defined(self):
+        msg = "The EMAIL_FILE_PATH setting must be set to use the file EmailBackend."
+        with (
+            self.settings(EMAIL_FILE_PATH=None),
+            self.assertRaisesMessage(ImproperlyConfigured, msg),
+        ):
+            filebased.EmailBackend()
+
     def test_error_if_file_path_is_not_directory(self):
         tmp_file = Path(self.tmp_dir) / "ordinary-file"
         tmp_file.touch()