When HELO parameter validation fails, a suggested procedure is to insert a note about the unknown authenticity of the sender into the message header (e.g., in the Received:line).

When HELO parameter validation fails, a suggested procedure is to insert a note about the unknown authenticity of the sender into the message header (e.g., in the Received:line).

当HELO参数的验证失败，一个建议的程序将插入一条关于发送者未知的确实性的短息到信息头部分（例如，在“接收的”行中）。