add ip change notification and refine sender display

app/config.py

@@ -28,6 +28,7 @@ class Settings(BaseSettings):
     smtp_port: int = 587
     smtp_username: str = ""
     smtp_password: str = ""
+    smtp_from_name: str = ""
     smtp_from_address: str = ""
     smtp_to_address: str = ""
     smtp_use_starttls: bool = True