diff --git a/airflow/providers/smtp/notifications/smtp.py b/airflow/providers/smtp/notifications/smtp.py
index 301fe507511..482b6ce8b93 100644
--- a/airflow/providers/smtp/notifications/smtp.py
+++ b/airflow/providers/smtp/notifications/smtp.py
@@ -34,7 +34,7 @@
 
 class SmtpNotifier(BaseNotifier):
     """
-    SMTP Notifier
+    SMTP Notifier.
 
     :param smtp_conn_id: The :ref:`smtp connection id <howto/connection:smtp>`
         that contains the information used to authenticate the client.
@@ -82,11 +82,11 @@ def __init__(
 
     @cached_property
     def hook(self) -> SmtpHook:
-        """Smtp Events Hook"""
+        """Smtp Events Hook."""
         return SmtpHook(smtp_conn_id=self.smtp_conn_id)
 
     def notify(self, context):
-        """Send a email via smtp server"""
+        """Send a email via smtp server."""
         with self.hook as smtp:
             smtp.send_email_smtp(
                 smtp_conn_id=self.smtp_conn_id,