Spam Filtering at Illinois State University

Last modified 9/14/2023

The spam filtering system at Illinois State University detects incoming spam and delivers suspected spam to your Junk Email folder. 

Spam Filtering System 

Spam filtering happens for all Illinois State University users with an Illinois State email address by scanning their email with Illinois State‚Äôs Spam filtering system. The system evaluates incoming messages and assigns them to one of three categories. 

  • Legitimate email 
  • Suspected spam 
  • Definitely spam

The spam filtering system handles each type of email differently. 

  • Legitimate emails are delivered to your Inbox. 
  • Emails that are suspected of being spam are delivered to your junk folder 
  • Emails that are definitely spam are blocked. 

Even though Illinois State University uses a spam filtering system, it is possible for spam to get through. Please review the following articles for more information about what Illinois State University is doing to protect your account, and to understand what Phishing emails are, and how to recognize them.  

Junk Email Folder 

All Microsoft 365 Email accounts and Exchange accounts include a folder named Junk E-mail where suspected spam is filtered. 

You may want to periodically check your junk folder to see if it contains any messages you want to read. 

Accessing Your Junk Email Folder 

Your Junk Email folder is accessible through, or by email clients such as Microsoft Outlook or Mozilla Thunderbird. Your junk folder appears with your other folders.  

If you have set up an Inbox Rule in Microsoft 365 to have your email redirected to a third-party email address such as Gmail or Yahoo, you should note that suspected spam emails are held in the Junk Email folder in Microsoft 365 and will not be redirected. To view the contents of your Junk Email folder, you will need to access your ISU Microsoft 365 email account. 

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