Registering Domains for Email Encryption

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For email encryption to work, you must register one or more domains to the Trend Micro Email Encryption Server.

Note:

If the produce license for Gateway Module is expired, Deep Discovery Email Inspector prevents you from configuring settings on the Email Encryption screen and removes the specified domain owner email addresses from the Trend Micro Email Encryption Server.
When you register a domain to the Trend Micro Email Encryption Server for the first time, Deep Discovery Email Inspector is also registered to the server.
You cannot re-register a domain that is already registered to the Trend Micro Email Encryption Server.
You can add and register up to 300 domains to the Trend Micro Email Encryption Server.

Go to Administration > Integrated Products/Services > Email Encryption.
In the Domain List section, review the domain registration procedure information.
Click Add.
On the Add Domain screen, do the following:
1. If this is the first time you are adding a domain, specify the email address to receive domain ownership verification key files from Trend Micro.
  Note:
  After the first domain is registered to the Trend Micro Email Encryption Server successfully, you can update the email address in the Appliance Information section.
2. Select an input option and do one of the following to add a domain to the Selected Domains list:
  - Type a domain in the text field and press Enter.
  - Select a domain from the list.
3. Click Save.
Note:
- You can add up to 10 domains at a time.
- Domains and their sub-domains are treated as unique entries. Sub-domains must be added separately to the domain list.
- Wildcards cannot be used to include sub-domains.
- LDAP groups (entries starting with" LDAP") cannot be added to the domain list.
If you are the registered owner of a domain in the domain list, reply to the confirmation message from Trend Micro.
Trend Micro sends the message to the following email addresses to verify ownership of the domain:
- postmaster@<domain>
- webmaster@<domain>
- The email address returned from a WHOIS lookup for the domain
When your domain is approved, Trend Micro sends the key file to the specified email address. To upload the key file, do the following:
1. In the Domain List section, click Import Key File.
2. Click Select File and select the key file.
3. Click Import.
Note:
Trend Micro sends a key file for each added domain to the specified email address. If you do not receive a message with the key file for a domain within three working days, contact your sales representative.

Tip:
After you have registered a domain, you can click Delete to remove a domain from the list. To add the delete domain to the list, you must perform the domain registration steps again.
If this is the first time you are registering a domain to the Trend Micro Email Encryption Server, check that the gateway ID information displays under Appliance Information.