Office 365 email has filters in place to protect users from spam and malicious email like phishing scams.
Messages caught by the filtersare placed in quarantine for your and MSU's protection. Users will receive aSpam Notificationmessage once a day, notifying them of any messages that have been placed in quarantine. Any legitimate mail caught by mistake can be released directly from this messageorfrom the quarantine portal (see details below).
Mail left in quarantine will automatically be deletedafter 15 days.
Handling Quarantined Email
Legitimate messages placed in quarantine may be released into your inbox one of two ways:
directly from the daily spam notification email message or
Userscan check the quarantine portal anytime or whenever they are missing expected email.
From the spam notification message:
If you receive mail that has been placed in quarantine you'll receive a message like that shown in image below. The following options will be available to you by clicking the respective links in the message or you can choose to do nothing.
Release to Inbox – message is removed from quarantine and placed in your inbox.
Report as Not Junk – Microsoft is sent a copy of message to be analyzed. Doing this tells Microsoft that the message isn't junk however, it does not guarantee that the message will not be placed in quarantine the next time it is received.
Do nothing– message is left in quarantine and deleted automatically after 15 days.
From the Office 365 Security & Compliance Center:
Quarantined email can also be handled in the Office 365Security & Compliance Center.
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Office 365 Email Filters and Quarantine
Office 365 Email Filters
Office 365 email has filters in place to protect users from spam and malicious email like phishing scams. Messages caught by the filters are placed in quarantine for the users' and organization's protection.
Quarantine Process
When messages are caught by the filters, they are placed in quarantine, and users receive a Spam Notification message once a day, notifying them of any messages that have been placed in quarantine Legitimate mail caught by mistake can be released directly from the spam notification message or from the quarantine portal It's important to note that mail left in quarantine will automatically be deleted after 15 days.
Handling Quarantined Email
Legitimate messages placed in quarantine may be released into the user's inbox in one of two ways: directly from the daily spam notification email message or from the Office 365 Security & Compliance Center Users can check the quarantine portal anytime or whenever they are missing expected email.
Options for Handling Quarantined Email
From the spam notification message, users have the following options available to them by clicking the respective links in the message or choosing to do nothing:
Release to Inbox: The message is removed from quarantine and placed in the user's inbox.
Report as Not Junk: Microsoft is sent a copy of the message to be analyzed. This action tells Microsoft that the message isn't junk; however, it does not guarantee that the message will not be placed in quarantine the next time it is received.
Do Nothing: The message is left in quarantine and deleted automatically after 15 days.
From the Office 365 Security & Compliance Center, quarantined email can also be handled by following specific steps:
Go to .
Click "Threat management" and then click "Review."
Click "Quarantine" anywhere in the box.
A list of the user's emails in quarantine will be displayed. Users can then choose from options such as releasing the message, viewing message headers, previewing the message, downloading the message, or removing it from quarantine.
In conclusion, Office 365 email filters and the quarantine process provide essential protection against spam and malicious emails, and users have specific options for handling quarantined email to ensure the smooth flow of legitimate communication.
Office 365 email has filters in place to protect users from spam and malicious email like phishing scams. Messages caught by the filters are placed in quarantine for your and MSU's protection. Users will receive a Spam Notification message once a day, notifying them of any messages that have been placed in quarantine.
After you select the message, use either of the following methods to remove it: On the Email tab: Select Delete from quarantine. In the details flyout of the selected message: Select More options > Delete from quarantine.
Here's a step-by-step guide to disable daily quarantine notifications: Access Quarantine Policies: Navigate to the Microsoft 365 Security & Compliance Center ( https://security.microsoft.com) . In the left-hand navigation pane, select Email & collaboration, then Policies & rules, and finally Quarantine policies.
To view your messages quarantined by Microsoft 365 Defender, please navigate to: https://security.microsoft.com/quarantine. Alternatively, you can open the 365 Defender portal by navigating to: https://security.microsoft.com and then navigate to 'Email & collaboration' -> 'Review' -> 'Quarantine'.
This is a new security feature implemented as part of the upgrade to Microsoft 365 and Exchange Online in spring 2023. These emails from Microsoft are legitimate.
Emails are quarantined when they're suspected of containing malware or phishing. Microsoft 365 may quarantine messages that Advanced Email Security might not, resulting in these emails being stored in the Microsoft 365 quarantine instead.
Messages quarantined by anti-spam policies as spam, high confidence spam, phishing, high confidence phishing, or bulk. In the default anti-spam policy.
Microsoft 365 Outlook - With the suspicious message selected, choose Report message from the ribbon, and then select Phishing. This is the fastest way to report it and remove the message from your Inbox, and it will help us improve our filters so that you see fewer of these messages in the future.
After you select the message, use either of the following methods to remove it: On the Email tab: Select Delete messages. In the details flyout of the selected message: Select More options > Delete from quarantine.
Admins can also use the global settings in quarantine policies to customize quarantine notifications in the following ways: Add translations in up to three languages. Customize the sender and logo that's used in the notification. Notification frequency (every four hours, daily, or weekly).
Also referred to as a “spam digest email”, your users can receive a notification, similar to the one below, once a day around midnight. This notification is an indication they have one or more quarantined messages and how to review them. The user is able to block senders, release, or review the messages.
Mailboxes are quarantined when they affect the availability of the mailbox database. Typically a software fix from Microsoft is required before releasing a mailbox from quarantine. If a fix isn't deployed before releasing the mailbox, the quarantine on the mailbox will be re-enabled if the condition recurs.
To view your messages quarantined by Microsoft 365 Defender, please navigate to: https://security.microsoft.com/quarantine. Alternatively, you can open the 365 Defender portal by navigating to: https://security.microsoft.com and then navigate to 'Email & collaboration' -> 'Review' -> 'Quarantine'.
On the leftmost side, select Account Management, and then Digests. If you're a user, select Digests. To enable quarantine digests, under Enable digests for user (or, if you're a user, under Receive Quarantine Digests), select Yes. To disable them, select No.
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