At IU, what is the spam quarantine service?
On this page:
- Spam deleted automatically
- False positives
- Filtering during your vacation (or opting out)
- Existing client-side filtering
UITS provides filtering services on all email accounts at Indiana University to reduce the amount of unsolicited commercial email (i.e., spam) stored on IU email servers. The services help you identify and eliminate unwanted email, and reduce the costly impact spam has on university resources.
The service analyzes all mail delivered to IU Cyrus/Webmail and
Exchange accounts. Messages marked as spam are quarantined for five
days in your
Spam (Cyrus/Webmail) or
The spam quarantine service uses separate filters on each mail system, as follows:
- Cyrus/Webmail: The service employs Sophos
PureMessage filtering, which analyzes incoming email for spam
potential, and then assigns each message a score from 0 to
100%. Messages scoring 45% or higher are delivered to your
Spamfolder, where they're quarantined for five days and then automatically deleted.
- Exchange: The service leverages the anti-spam capabilities built into Exchange and Outlook Web App (OWA). Exchange scans incoming messages and labels each one with a Spam Confidence Level (SCL) rating. Messages with an SCL of 6 or higher are delivered to your Junk E-mail folder, where they're quarantined for five days and then automatically deleted.
Email sent from within the IU community is not filtered.
Spam deleted automatically
Junk E-mail folder
frequently, since messages more than five days old are deleted
You cannot retrieve email purged from the
in Cyrus/Webmail. However, email purged from the
The spam quarantine service may deliver some false positives (i.e.,
messages that you want to keep) to your
Junk E-mail folder. To keep such a message, move it to
another folder. In Exchange, you can prevent future false positives by
adding the sender to your Safe Senders list. In Cyrus/Webmail, you can
add the sender to your Whitelist filter rule; see In IU Webmail, how do I use the Whitelist filter rule to avoid
having legitimate mail quarantined as spam?
Filtering during your vacation (or opting out)
If you're going away on vacation, or are otherwise unable to monitor your email account for five days, or if you'd rather not participate in the spam quarantine service at all, you can opt out of the service.
Existing client-side filtering
You don't need to enable any client-side filtering to participate in the spam quarantine service, but you can choose to augment the service with client-side filters, rules, or junk mail features.
The spam quarantine service is compatible with the filtering rules in Cyrus/Webmail, which you can use to augment Sophos PureMessage filtering if needed.
If you use Outlook to read your Exchange account, you can have Cached Exchange Mode enabled to use Outlook's Junk E-mail filter to augment the anti-spam filter on the Exchange server.
For help while using Office applications, press
click the question mark on the upper right. For more, see How can I get help with Microsoft Office software?
This is document spam in the Knowledge Base.
Last modified on 2015-07-17.
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