This article applies to:

• Trustwave MailMarshal (SEG)
• Blended Threats functionality

Question:

• How can I avoid rewriting of subject lines by the Blended Threat function? 

Comments:

By default the Blended Threat function rewrites URLs that are found in message subjects. This behavior is by design to ensure security, because some email client software renders clickable links in the subject.

Users may find that the rewritten subjects are difficult to read.

Procedure:

To disable rewriting of URLs in subjects:

• In MailMarshal 10.0 and above, open the Management Console and navigate to Advanced Settings. Add a new value:
  • Name: Engine.BTMRewriteURLInSubject
  • Type: Boolean
  • Value: False (unselected)
• In MailMarshal 8.X and below, open the Registry Editor on the Array Manager. Within the base registry key, navigate to \Default\Engine
  • In version 8.X: HKEY_LOCAL_MACHINE\SOFTWARE\Trustwave\Secure Email Gateway\Default\Engine
  • For information about the registry location for each version, see article Q10832.
  • Enter the value as a new DWORD value named BTMRewriteURLInSubject with value 0 (false).
• Save your registry settings or configuration settings.
• Commit the configuration changes and restart the MailMarshal Engine service on each node.

Notes:

• As best practice, back up the registry before making changes.