Configuring Approved and Blocked Sender Lists

Configure the Approved Senders and Blocked Senders lists to control which email messages Trend Micro Email Security scans. Specify the senders to allow or block using specific email addresses or entire domains.

For example, *@example.com specifies all senders from the example.com domain.

Evaluation is done in the following order:

  1. End User Console blocked sender list

  2. Administrator console blocked sender list

  3. End User Console approved sender list

  4. Administrator console approved sender list

Note:

Approved senders added to the End User Console will not override blocked senders for the same email address or domain in the administrator console. For example, assume that *@example.com is in the blocked sender list of the administrator console, and john@example.com is in the approved sender list in the End User Console for an end user. Messages from john@example.com will still be blocked.

IP reputation-based filters use only IP address data to filter messages. You can also use sender email address and domain to filter incoming messages. Approved senders bypass IP reputation-based filtering at the MTA connection level.

Lists of approved or blocked senders are managed using the following screens:

  • Approved Senders

    Trend Micro Email Security will not perform the following checks on email messages from senders added to this list:

    • IP reputation-based filtering

    • Unknown sender domain check

    • Spam

    • BEC

    • Phishing

    • Social engineering attack

    • Web reputation

    • Graymail

    Trend Micro Email Security still performs virus scanning and content filtering on all messages received and takes the action configured in policy rules once detecting any virus or content filtering violation.

    Go to Inbound Protection > Connection Filtering > Sender Filter > Approved Senders to display this screen.

  • Blocked Senders

    Trend Micro Email Security automatically blocks messages sent from addresses or domains added to the blocked list without submitting the messages to any scanning.

    Go to Inbound Protection > Connection Filtering > Sender Filter > Blocked Senders to display this screen.

The Approved Senders and Blocked Senders tables display the following information:

  • Sender: The email address or domain that you approved or blocked for the specified Recipient Domain

  • Recipient Domain: The managed domain for which you approved or blocked the specified sender

  • Date Added: The date that you added the sender to the list