We have done SPAM judgments of all mails which incoming mails to JAIST and outgoing mails from JAIST.

SPAM Judgement and Quarantine Services

SPAM judgement

  1. SPAM       : Obvious SPAM mail.
  2. Suspected SPAM : Possible SPAM mail.


By default, the above SAPM mails are delivered to Junk folder of your mailbox.

Also, outgoing SPAM mails are quarantined to the mail server. The system notifies to the sender.


To edit SPAM judgement policy, see the below.

SPAM mail

How to Check Quarantined Mails

Using the Web-mail, you can check the quarantined mails.

※ If you are using IMAP service, you can see at "Junk" folder.

SPAM and Suspected SPAM mails delivered to "Junk" folder.

The mails in these folders are automatically deleted after 30 days.

Please check the mails of these folders regularly.

Anti-spam False Positive or Missed Spam

If you are no problem to send that message to other people, please submit a missed spam message or a message that incorrectly marked as not-spam.

Send false negative (missed spam) messages to

Send false positive (mail marked as spam, but it is actually ham) messages to

All of the submitted messages must be in the RFC 822 format.

For details of RFC 822 format, please see the following page.

How to Stop Miss SPAM Judgment

SPAM judgement mechanism has hidden with the object of security.

If your mail was judged as a SPAM frequently, we are recommended that you send with a digital signature to outgoing mail.
You can use the digital signature with importing your digital certificate to Web browser or Mail software in your computer .
For details, please see the following page.

S/MIME Function(ThunderBird)

Block Message (Spam Mail Options of Web-Mail)

You can reject emails from particular addresses and domains by using the Spam mail options of Web-Mail.

For details, please see this page.