During the following date and time, there was a problem with sending and receiving e-mails.

The e-mails sent from our university were being identified as SPAM depending on the e-mail system used by the recepient.

Please be aware that when an e-mail is marked as SPAM, an error message may or may not be returned to the sender.

For e-mails to the University, those who use Outlook Online (Exchange) (a part of faculty and staff) are receiving error messages back to the sender, while Gmail(student, a part of faculty and staff) is not affected.

Occurrence date and time of the outage:
From 10:30 am to 5:30 pm on 8/19/2023 (JST)

Reason for the problem:
Due to a failure of the spamhaus project, which provides a list of SPAM email sending sites, our University's mail server was incorrectly registered, and mail systems such as Outlook Online, which uses spamhaus, detected it incorrectly.