You need to block messages from senders that do not comply sender policy framework （SPF）.What do you need to implement？（）
- A、Receive connector
- B、Sender ID Filtering
- C、Sender Filtering
- D、Send connector
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You need to block messages from senders that do not comply sender policy framework （SPF）.What do you need to implement？（）
微信扫一扫手机做题