InterScanTM Messaging Security Virtual Appliance - Online Help ...

Trend Micro InterScan Messaging Security Virtual Appliance Administrator’s Guide
7-6
By design, after a domain is registered, it cannot be re-registered. If a domain has already
been registered, subsequent re-registration results in a "domain already registered" error.
This is enforced for the purpose of security. If there is a need to reinstall IMSVA,
backup the database prior to re-installation, and restore it afterwards. This eliminates the
need to re-register IMSVA and the same domains after re-installation.
Note: IMSVA must be registered to the encryption service before any domains can be
registered.
The default sender address for your domains will be postmaster@. You can
customize the default sender address from the Encryption Settings screen.
The default sender address is used when IMSVA trys to encrypt an email message, but
whose domain is not in the Domain List. IMSVA signs these email messages with the
default sender address.
To register domains to the encryption service:
Navigation Path: Policy > Encryption Settings
1. Navigate to the Encryption Settings screen.
2. Click Add on the Domains tab.
3. Add the domains you want to protect to the domain list. Domains can be manually
typed or selected from a list of existing domains. Up to 10 domains can be added at
a time.
Note: 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.
4. Click Save A progress bar appears as the domain information is sent to the Trend
Micro Email Encryption Server. A confirmation screen appears that verifies the
domain information was received by the Trend Micro Encryption Server.
5. Read the instructions about what to do once you receive the verification key file.