Configure the Subject Prefix

  1. Access the Email Security Administrator Portal.
  2. From the left navigation panel, go to Policy.
  3. Create a new Threat Detection policy or open an existing policy.
  4. Select the required protection mode.

    • Prevent (Inline)

    • Detect and Remediate

  5. In the Phishing section, select User receives the email with a warning from the required workflow dropdown.

    • Phishing workflow

    • Suspected phishing workflow

  6. Click the gear icon next to the workflow action.
  7. In the configuration window, modify the Customize Phishing Subject Alert Format field according to your organizational requirements.
  8. Click Save and Apply.

The custom subject prefix is applied to the selected phishing workflow. Emails that match the Phishing or Suspected phishing criteria are now delivered to the end user with the configured warning and the customized subject alert format prepended to the email subject line.