Campus E-mail system (http://mail.njau.edu.cn/) can be used by all the students, teachers and other staff in the campus.

Users need to activate the mailbox in the Information Reminder section of the information portal.Users need to activate the mailbox in the Information Reminder section of the information portal. The capacity of mailbox is unlimited. 

Students’ username is their Student ID, the E-mail address is like ID@stu.njau.edu.cn. Teacher's username is they Teacher ID and the E-mail address is like ID@njau.edu.cn. Users can have custom usernames only one time.

The E-mail Client is able to process e-mails over the POP3 or IMAP protocols.
The Authentication Settings of the Outgoing Mail Server should be set as smtp.njau.edu.cn.
The Incoming Mail Server over POP3 should be set as pop3.njau.edu.cn.
And the Incoming Mail Server over IMAP protocols be set as imap.njau.edu.cn.

If you use an email client to deal with your email, you must setup an authorization code instead of your email password to login. After you login to webmail you can set the authorization code in client settings.