Adding an Internal Domain

Add all internal domains you use in your organization to allow Deep Discovery Email Inspector to detect potential email message spoofing.

  1. Go to Administration > Scanning / Analysis > Other Settings > Business Email Compromise Protection.
  2. Under Internal Domains, type a domain name (for example,

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

  3. Click Add.
    • You can add up to 100 domains.

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