Anti-spam is caused by mail rejection. Because the recipient has set a personal blacklist or the anti-spam level is too high, the mail will not be received by the students in the mailbox of Jida University, which is caused by anti-spam rejecting the mail. The solution is to enter the mailbox settings and add "white list" in the "anti-spam" option. The mailbox of Jilin University is very convenient for daily affairs such as course study and educational administration, and it is one of the essential tools for teachers and students of Jilin University. Log in to the portal and you can easily enter the mailbox and enjoy convenient mail service.