module documentation
(source)

Mail service support.
Class ​Bounce​Domain A domain with no users.
Class ​Domain​With​Default​Dict A simulated dictionary for mapping domain names to domain objects with a default value for non-existing keys.
Class ​File​Message A message receiver which delivers a message to a file.
Class ​File​Monitoring​Service A service for monitoring changes to files.
Class ​Mail​Service An email service.