You can import LDAP Data Interchange Format (LDIF) or comma-separated values (CSV) files into Hosted Email Security. This helps Hosted Email Security to better filter and process messages for valid email addresses. Messages to invalid email addresses will be rejected.
Before you import an LDIF or CSV directory file, note the following:
Hosted Email Security only recognizes ANSI-encoded LDIF (with the extension .ldf) and ANSI or UTF-8-encoded CSV (with the extension .csv) files. Do not include blank lines or other irrelevant data in the file that you import. Use caution when creating a file.
When importing user directory files, Hosted Email Security replaces all records for a managed domain at once. If any email addresses for a managed domain are imported, all other email addresses for that domain are removed. Newly imported email addresses for that domain, and records for other managed domains, will be kept. If you import an updated user directory file that does not have any information for one of your domains, the entries for those domains remain the same and are not overwritten.
Every time you import a directory file, it overwrites the old version. If you import an updated directory file that has information for one of your domains, all entries for those domains are overwritten. Use caution when importing a directory.
You can only see the directories that are associated with your administrator account. If you are sharing your Hosted Email Security service with another administrator (for example, a value-added reseller) who logs on with his/her specific account information, Hosted Email Security will not show the directories for that account.
Every time you add more users to your network, you must import your updated user directories; otherwise, Hosted Email Security will reject email from newly added users.
Trend Micro strongly suggests that you do not import more than 24 directories in a day. Doing so could overwhelm system resources.
If you create a CSV file, divide the records into fields for email_address and Firstname Lastname and separate them using a comma and optional quotation marks. Use of spaces or other delimiters is not supported. Use one record per line.
firstname.lastname@example.org,Bob Smith email@example.com,Sally Jones
"firstname.lastname@example.org","Bob Smith" "email@example.com","Sally Jones"
firstname.lastname@example.org,Bob Smith,email@example.com,Sally Jones
Microsoft Excel will save a two column chart as a CSV using valid formatting.
After the progress bar completes, a summary screen appears showing the following:
Summary: A summary of the information above
Domains and Number of Current Users to Replace Current Users: The domains that you specified when you subscribed to the Hosted Email Security service
Invalid domains: Any domains that are included in your directory file, but are not officially registered with your Hosted Email Security service
Hosted Email Security does not provide service for these domains and their corresponding email addresses.
This will import and then enable the email address list.
You can verify which email addresses were found by selecting your domain name and clicking the Export to CSV button.
If you need to disable the feature, you can click the toggle.
The toggle button shows the current enabled or disabled status of Recipient Filter in Inbound Protection > Recipient Filter.