If that domain has published a sender policy framework (SPF) record, the agent uses the SPF record to evaluate the message according to the specification for RFC 4408.是什么意思_If that domain has published a sender policy framework (SPF) record, the agent uses the SPF record to evaluate the message according to the specification for RFC 4408.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句