| 摘要 |
A system and method is directed to providing a knock notification in response to a message from an unknown sender. The method includes maintaining a data store of message senders that an end-user has identified as an allowed sender. A received message is evaluated to determine whether its sender is an allowed sender. If the sender is an allowed sender, the received message is forwarded to the end-user. If it is determined that the sender is an unknown sender, a knock notification message is generated. In one embodiment, the knock notification message includes the information about the sender and a mechanism to enable the end-user to allow/disallow the sender. If the end-user disallows the sender, the received message is discarded. Information associated with the disallowed sender is included in a data store for disallowed senders. The end-user may review and revise the data stores of allowed and disallowed senders. |
