YOU SAID:
This mailbox is not monitored and we will not be able to respond to your reply
INTO JAPANESE
このメールボックスは監視されておらず、返信に返信することはできません
BACK INTO ENGLISH
This mailbox is not monitored and can not reply to replies
INTO JAPANESE
このメールボックスは監視されず、返信に返信できません
BACK INTO ENGLISH
This mailbox is not monitored and can not reply to replies
That didn't even make that much sense in English.