diff --git a/demoapp/custom_user/models.py b/demoapp/custom_user/models.py
index e026f67c..87e5373e 100644
--- a/demoapp/custom_user/models.py
+++ b/demoapp/custom_user/models.py
@@ -8,4 +8,6 @@ class CustomEmailAddress(AbstractEmailAddress, SwappableMetaMixin):
     phone_number = models.CharField(max_length=20, blank=True, null=True)
 
     class Meta:
+        app_label = 'sendmail'
+        db_table = 'custom_email_address'
         verbose_name = 'Custom User'
diff --git a/demoapp/settings.py b/demoapp/settings.py
index f9a71b45..ebcc1eb7 100644
--- a/demoapp/settings.py
+++ b/demoapp/settings.py
@@ -117,7 +117,7 @@
         'NAME': os.getenv('DB_NAME', 'new_post_office'),
         'USER': os.getenv('DB_USER', 'post_office'),
         'PASSWORD': os.getenv('DB_PASSWORD','post_office'),
-        'HOST': os.getenv('DB_HOST','127.0.0.1'),
+        'HOST': os.getenv('DB_HOST','localhost'),
         'PORT': os.getenv("DB_PORT", '5432'),
     }
 
@@ -171,38 +171,34 @@
 # EMAIL_HOST_PASSWORD = 'test'
 #print(EMAIL_HOST, EMAIL_PORT, EMAIL_HOST_USER, EMAIL_HOST_PASSWORD)
 
-TEMPLATES = [
-    {
-        'BACKEND': 'sendmail.template.backends.sendmail.SendMailTemplates',
-        'APP_DIRS': True,
-        'DIRS': [os.path.join(BASE_DIR / 'demoapp' / 'templates')],
-        'OPTIONS': {
-            'context_processors': [
-                'django.contrib.auth.context_processors.auth',
-                'django.template.context_processors.debug',
-                'django.template.context_processors.i18n',
-                'django.template.context_processors.media',
-                'django.template.context_processors.static',
-                'django.template.context_processors.tz',
-                'django.template.context_processors.request',
-            ]
-        }
-    },
-    {
-        'BACKEND': 'django.template.backends.django.DjangoTemplates',
-        'DIRS': [],
-        'APP_DIRS': True,
-        'OPTIONS': {
-            'context_processors': [
-                'django.template.context_processors.debug',
-                'django.template.context_processors.request',
-                'django.contrib.auth.context_processors.auth',
-                'django.contrib.messages.context_processors.messages',
-            ],
-        },
+TEMPLATES = [{
+    'BACKEND': 'sendmail.template.backends.sendmail.SendMailTemplates',
+    'APP_DIRS': True,
+    'DIRS': [os.path.join(BASE_DIR / 'demoapp' / 'templates')],
+    'OPTIONS': {
+        'context_processors': [
+            'django.contrib.auth.context_processors.auth',
+            'django.template.context_processors.debug',
+            'django.template.context_processors.i18n',
+            'django.template.context_processors.media',
+            'django.template.context_processors.static',
+            'django.template.context_processors.tz',
+            'django.template.context_processors.request',
+        ]
+    }
+}, {
+    'BACKEND': 'django.template.backends.django.DjangoTemplates',
+    'DIRS': [],
+    'APP_DIRS': True,
+    'OPTIONS': {
+        'context_processors': [
+            'django.template.context_processors.debug',
+            'django.template.context_processors.request',
+            'django.contrib.auth.context_processors.auth',
+            'django.contrib.messages.context_processors.messages',
+        ],
     },
-
-]
+}]
 
 SENDMAIL = {
     'TRACKING_ENABLED': True,
@@ -230,7 +226,7 @@
 }
 WSGI_APPLICATION = "demoapp.wsgi.application"
 #EMAIL_ADDRESS_MODEL = 'sendmail.EmailAddress'
-EMAIL_ADDRESS_MODEL = 'custom_user.CustomEmailAddress'
+EMAIL_ADDRESS_MODEL = 'sendmail.CustomEmailAddress'
 DATA_UPLOAD_MAX_NUMBER_FIELDS = 100000
 
 # Database
@@ -241,9 +237,7 @@
 # https://docs.djangoproject.com/en/3.0/ref/settings/#auth-password-validators
 
 AUTH_PASSWORD_VALIDATORS = [
-    {
-        "NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",
-    },
+    {"NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",},
     {"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator", },
     {"NAME": "django.contrib.auth.password_validation.CommonPasswordValidator", },
     {"NAME": "django.contrib.auth.password_validation.NumericPasswordValidator", },
@@ -278,7 +272,7 @@
              'JustifyRight', 'JustifyBlock'],
             ['Link', 'Unlink'],
             ['Image'],
-            ['Format']  # Adding headers (e.g., Heading 1, Heading 2, etc.)
+            ['Format'],  # Adding headers (e.g., Heading 1, Heading 2, etc.)
         ],
         'format_tags': 'p;h1;h2;h3;pre',  # Define the available formats (headers and others)
     }
diff --git a/sendmail/mixins.py b/sendmail/mixins.py
index e520536a..7ba64e0c 100644
--- a/sendmail/mixins.py
+++ b/sendmail/mixins.py
@@ -8,4 +8,4 @@ def __init_subclass__(cls, **kwargs):
         if not hasattr(cls, 'Meta'):
             cls.Meta = type('Meta', (), {})
 
-        cls.Meta.swappable = get_email_address_setting()
\ No newline at end of file
+        cls.Meta.swappable = get_email_address_setting()