Trend Micro InterScan Messaging Security DKIM Signature

Trend Micro™ InterScan™ Messaging Security provides the most comprehensive protection against both traditional and targeted attacks.  Using the correlated intelligence from Trend Micro™ Smart Protection Network™ and optional sandbox execution analysis, it blocks spam, phishing, and advanced persistent threats (APTs).

1. Trend Micro DKIM Setup

1. Go to "Administration" → "IMSVA Configuration" → "DKIM Signature".
   
   
2. Click "Enable DKIM signature" and select one or multiple headers to sign.
   
   Please Note: The From header is selected by default. To add more message headers for selection, click Customize.
   
   
3. Click "Add".
   
   The "Add DKIM Signature" screen appears.
   
   
4. Specify the general settings.
   
   - Domain: Specify the domain where email messages are sent, for example, *.example.com.
   - SDID: Specify the signing domain identifier, for example, example.com.
   - Selector: Specify the selector to subdivide key namespace or retain the default value.
   - Private key: Upload a private key or request IMSVA to create a private key. If you want to generate a private key, select the key length before generation.
   
   
5. (Optional) Specify the advanced settings.
   
   - Header canonicalization: Select Simple or Relaxed.
   - Body canonicalization: Select Simple or Relaxed.
   - Enable signature expiration: If you select this option, set the number of days that the signature will be valid.
   - Enable body length: If you select this option, set the number of bytes allowed for the email body.
   - AUID: Specify the Agent or User Identifier on behalf of which SDID is taking responsibility.
   - Exempt domain: Specify one or multiple domains to be excluded from DKIM signing.
   
   
6. Click "Save".