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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. Blocked sender list of an end user's email address
  2. Blocked sender list of managed domains or the entire organization
  3. Approved sender list of an end user's email address
  4. Approved sender list of managed domains or the entire organization
Note
Note
Approved senders of an end user's email address will not override blocked senders for the corresponding domain or organization. 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 of 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 tabs on the Inbound Protection → Connection Filtering → Sender Filter screen:
  • 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.
  • 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.
The Approved Senders and Blocked Senders tables display the following information:
  • Status: Specifies whether the senders added to a recipient are enabled
  • Recipient: The recipient for which you approved or blocked the specified sender. The options include the entire organization, a managed domain, or a specific recipient address in a managed domain.
    Note
    Note
    To view the approved or blocked senders added to the Recipient, click the recipient name.
  • Modified: The date and time that you last modified the senders of the recipient
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