Exchange Online Protection Spam Filter

Microsoft Exchange Online Protection's spam filter screens and quarantines suspicious email messages before they reach your inbox. Filtered messages include marketing emails, spam and newsletters. They remain in this area for fourteen (14) days.

Check your spam folder through Office 365



Step 1. Log in to your Office 365 account:

Step 2. Click the waffle icon to see a list of apps. Click the All apps link to expand the list.


Step 3. Choose SPAM Quarantine from the list. The Security & Compliance Center opens.


Step 4. Click the down arrow beside Threat Management to expand the options. Click Review. The quarantine dialog box opens.


Step 5. Click the spam icon to open your spam quarantine list.

  • Click an item to highlight.The Details dialog box opens.
    • Preview the message
    • Release the message to your inbow
    • View the message header
    • Download the item

Manage spam through the quarantine notification

There are four maintenance actions from which to choose:

Do nothing. Captured messages are deleted after 14 days.
Release a message back to the Inbox. Click the Release to Inbox link from the spam notification message. This is a one-time event, and subsequent emails from the same address will continue to be quarantined.
Report as Not Junk. Click the Report as Not Junk link in the spam notification message. Messages from this address go directly to Microsoft for analysis.

Manually report a message as spam. As with ECU's previous spam filter, users can report a spam email that was not caught by the spam filter. To report a message as spam, send the spam email as an attachment to
Unsubscribe to the newsletter. Most unsubscribe links are at the bottom of a marketing email. Release a quarantined message, open it and click the unsubscribe link found at the bottom of the message.

The Junk Folder Works With the Spam Filter

An email reaches the EOP spam filter as it passes through the server. If it meets the criteria for one of these categories, it is quarantined:

  • High confidence SPAM
  • SPAM
  • Phishing

If the message is considered "bulk," it travels on to the junk folder. Users should check the junk folder to determine if these messages should be

  • blocked
  • never blocked
  • Not Junk, etc.

You can also right-click a message in any folder of your mailbox to set the junk options. Junk email options allow users to see the lists of blocked and safe senders.

Please Note!

The Junk folder occasionally catches non-spam email as well, so it is a good idea to check this folder often to make sure you are receiving all your mail.