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Approved and Blocked Senders
Messages from approved senders are able to bypass the Email Reputation service and antispam filters, while messages from blocked senders are prevented from reaching recipients.
Specifying an IP address will block or approve all messages from that IP address.
The approved lists take precedence over the blocked list, the Email Reputation filter, and the antispam filter. All messages from addresses that match the addresses in the approved list are not processed by these filters.
The Approved list from IP Filter or Spam rules can be imported to the Cloud Pre-Filter Approved list.
Valid Recipients
This feature works by comparing the list of users on your LDAP servers to a list of your users on Cloud Pre-Filter. The Cloud Pre-Filter list of your users is generated by synchronizing with your LDAP servers.
Use the valid recipient check to block all email that does not have a recipient on your domain. This prevents malicious email messages and spam from reaching your network.
Trend Micro recommends enabling scheduled synchronization to ensure all vaild email reaches your network. LDAP servers must be configured before enabling the valid recipient check and scheduled synchronization.
To configure Condition Settings:
Click Next. The Step 2: Specify Sender conditions screen appears.
Click Add to add an entry to the list. The Add Approved/Blocked Sender List screen appears.
Provide an email address or IP address.
Click Add beside the IP Address and Email Address fields. The entry appears in the list.
The wildcard character * may be used to specify any string in the local-part (local-part@domain.com) of email addresses. Use wildcard characters with caution as they may allow or block messages from a large set of email addresses.
Click Add under the list. The entry appears in the specified list.
To import entries to the approved or blocked senders list:
When using the import function, use a text file with only one full email or IP address per line.
When importing sender addresses, ensure that you select the correct import mode. Selecting to replace addresses will delete all existing addresses from the list.
Click Import for the specified list. A dialog box appears.
Specify the file to import.
Click Import. The list displays the imported entries.
Select Enable valid recipient check.
Select Synchronize LDAP server with Cloud Pre-Filter daily.
Trend Micro recommends enabling scheduled synchronization to ensure all vaild email reaches your network.
See also:
Cloud Pre-Filter Service Overview
Creating a Cloud Pre-Filter Account