WEBHelp Center for Peking University Mail System, offering guidance on how to log in, set up, and use the professional email service for PKU teachers and students.
WEBWhy can't sender receive a reject letter when the recipient does not get the email from the sender? In rare cases,the sending email wasn't received for some reasons,and rejected.And in this time,the reject letter just over the remaining space of the sender,due to the available little space of the sender mailbox.