求翻译：加密客户端Outlook给外部邮箱发送附件的时候,会自动添加抄送地址,同时密文附件进行解密.外部邮箱则不进行控制也不解密.是什么意思？

Encryption client outlook to send an attachment to an external mailbox will automatically add a CC address, to decrypt the secret annex. External mailbox not control and is not decrypted.

Encrypted client Outlook attachment is sent to an external mailbox, it will be automatically added Cc Address, and key to decrypt the annex outside your mailbox, it is not a control key is also puzzling.

Encryption client side Outlook for exterior mailbox transmission appendix time, can increase automatically sends duplicate the address, simultaneously the scrambled text appendix carries on the decipher. Exterior mailbox does not carry on the control not to decipher.

Encrypt client Outlook when sending attachments to external mailboxes, CC addresses are automatically added, at the same time decrypting ciphertext attachments. external mailbox does not control nor is decrypted.

正在翻译，请等待...