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Important:

For SMTP traffic throttling, Deep Discovery Email Inspector checks the senders against the Approved Senders and Blocked Senders lists in the following order:

  • Approved Senders list (IP address)

  • Blocked Senders list (user-defined IP address)

  • SMTP traffic throttling (IP address)

  • Approved Senders list (email address)

  • Blocked Senders list (user-defined email address)

  • SMTP traffic throttling (email address)

Note:

You can add up to 2048 entries to the list.

  1. Go to Administration > Sender Filtering/Authentication > Blocked Senders.

    The Blocked Senders screen appears.

  2. Click Add.

    The Add Blocked Senders screen appears.

  3. Select and configure one of the following:

    • Domain: Select this option to specify the domain of the senders. You can select one or more Resource record types.

      Note:

      Deep Discovery Email Inspector regularly resolves the specified domain, and adds the resolved IP addresses as a user-defined entry in the Blocked Senders list or updates the resolved IP addresses in the entry.

    • IP address or subnet: Select this option to specify the IPv4/IPv6 address of a sender or the subnet of multiple senders.

    • Email address: Select this option to specify the email address of the sender.

      Tip:

      Deep Discovery Email Inspector support email domains. For example, *@example.com indicates all email addresses in example.com domain.

  4. Click Save.
Parent topic: Blocked Senders List