Which of the following is true regarding the mail queue of a mail server? (Choose TWO correct answers.)
A. The messages in the queue must be readable by all users as the queue may contain messages for several users.
B. According to the Filesystem Hierarchy Standard (FHS) the queue is located at /var/mail/spool.
C. There is exactly one mail queue per user which holds all new messages for that user before they are moved to other folders by the users mail client.
D. The queue holds all messages that are processed by the mail server but have not yet been completely delivered.
E. The content of the mail queue can be queried by the command mailq.