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Setting the quarantine confidence threshold

An administrator uses the Quarantine trust threshold on the Settings screen to ensure that incoming emails whose trust score falls below a certain percentage are quarantined. Before saving, the screen shows which emails in the inbox will go to quarantine with the selected threshold. How the trust score is calculated security is explained on the page.

  • Administrator (permission to manage mailboxes)

How to set the quarantine confidence threshold?

The administrator uses the Quarantine trust threshold in the Settings screen to ensure that incoming emails with a trust score below a certain rate are quarantined. Who can do this: Administrator (permission to manage mailboxes). New incoming emails are evaluated according to the threshold. The screen shows which emails in the inbox will go to quarantine with the selected threshold before saving.

Steps

  1. Open Settings from the left menu and go to the Quarantine confidence threshold row.

  2. Drag the slider or enter a percentage in the box next to it 1. The higher the threshold, the more emails are quarantined.

  3. Read the preview that appears below 2. The line "With this threshold, … emails are quarantined." and sample email subjects show how the threshold affects emails in the inbox.

  4. Save the threshold with Save on the row. The saved threshold affects emails received from then on.

  5. If you also want to apply the threshold to emails already in the inbox, click Apply to existing emails 3 and select Yes, apply in the confirmation that opens.

Quarantine confidence threshold: slider, percentage box, preview of emails that will be quarantined at this threshold and Apply to existing emails button
  1. 1Set the threshold
  2. 2Affected emails
  3. 3Apply to existing ones too
Quarantine confidence threshold and impact preview, with demo data.
Result Incoming mails are evaluated according to the threshold. If applied to existing mails, the screen reports how many mails were quarantined and the action is written to the audit log.
TipRequests written to you, addresses you have corresponded with before and emails that address you by name are not quarantined regardless of the threshold. A quarantined email can be released by the user one by one.

Common issues

The Apply to existing emails button is not working.
The reason appears next to the button: if it says "Save the threshold first.", save the threshold; if it says "There are no emails to move with this threshold.", the selected threshold does not affect any existing email.
Why is the mail location always consistent with the score?
The security score of an email in the Inbox is always shown above the threshold, while the score of an email in quarantine is always below the threshold. The score of an email quarantined by strict rules (e.g., replies going to another address) also drops below the threshold.
AI could not analyse the email.
When the AI allowance is used up or analysis cannot be performed, the decision falls back to this threshold: an email with a confidence score below the threshold is quarantined.

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