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On the Cousin Domains screen, you can configure legitimate sender domains and the detection threshold setting that Deep Discovery Email Inspector uses to detect cousin domains in email messages.

  1. Go to Administration > Scanning / Analysis > Other Settings > Cousin Domains.
  2. Add one or more legitimate sender domains. Do the following:
    1. Type a domain name (for example, domain.com).

      You can specify up to 255 printable ASCII characters for the domain name. Do not use semi-colon ";" characters.

    2. Click Add.

      • You can add up to 1000 domains.

      • To delete a domain, select the entry and click Delete.

  3. Select a detection threshold.

    • Aggressive: This option provides the most number of detections based on fuzzy matches. This is the most rigorous level of spam and phishing detection.

    • Normal: This is the default and recommended setting. This option provides a moderate number of detections.

    • Conservative: This option provides the most accurate detections based on near-exact matches.

  4. (Optional) Specify one or more domains that Deep Discovery Email Inspector excludes from scanning. Type a domain and press [Enter] to add an entry.
  5. Click Save.
Parent topic: Cousin Domains