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Junk Mail

If you receive a message in your Inbox that you believe is spam or a phishing attempt, you can report it. Reporting it will trigger a re-analysis and notify the administrators.

Reporting Unidentified Junk Mail

Windows / Web (new interface)
  1. Select the incorrectly classified message, click the Report[1] button and then select the Report phishing or Report junk button.
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Windows (old interface)
  1. Select the incorrectly flagged message and click the red shield icon[1].
  2. Select the Report Phishing button or the Report Junk button.
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Android / iOS
  1. Open the incorrectly flagged message and click the 3 dots
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  1. Select the Report Spam button
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  1. Confirm your selection by tapping Report
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Reporting Incorrectly Flagged Spam

If a message is delivered to your Junk folder that has been incorrectly flagged and is not actually spam, you can also report it. Reporting it will trigger a reanalysis and notify the administrators.

Outlook (new interface)
  1. Go to the Junk Email folder and select the incorrectly flagged message.
  2. Click the Report[1] button and then select Not junk.
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Outlook (old interface)
  1. Go to the Junk Email folder and select the incorrectly flagged message.
  2. Click the red shield icon[1] and select Not Junk.
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Blocking or Unblocking a Sender

Users can manage messages and senders and, at their discretion, can:

  • Block a sender – this blocks a specific sender; subsequent e-mails will be automatically delivered to the Junk folder
  • Never block the sender – in the future, no e-mails from this sender or this domain will be delivered to the Junk Mail folder

Outgoing Mail Limits

To prevent spam, limits are set on the number of outgoing messages:

RoleMaximum per hourMaximum per day
Employee1,0005,000
Partner1001,000
Student1001,000
Inactive Account20100

How to Report an Issue

Junk Mail

If a user in the MS365 environment reports undetected spam in their inbox (or if an administrator identifies it through their own observation), the following steps will be taken:

  • Verify whether the e-mail is demonstrably spam
  • If it is verifiably spam, the e-mail will be reported to MS365, thereby reducing future misclassifications
  • In cases of serious concern, the specific e-mail will be moved to the Spam folder for all affected users within MS365
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Phishing

If a user in the MS365 environment reports an undetected phishing attempt in their inbox (or if an administrator identifies it through their own observation), the following steps will be taken:

  • Verify whether it is demonstrably a phishing attempt
  • If it is verifiably phishing, this e-mail will be reported to MS365, thereby reducing future misclassifications
  • Determine the number of affected accounts
  • Block the phishing link within MS365
  • Move the specific e-mail to the junk mail folder (for all affected accounts in EXO)
  • Report the phishing link to web services (CESNET, ESET, Google, etc.)
  • Reporting the phishing link to the hosting provider where the phishing page is located (if possible)
  • Blocking the sender’s address for a period of 7 days
  • Reporting the security incident to the cybersecurity manager
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  1. If the Report button is not available in Outlook, report messages using the CTU Mail web application. ↩