Add security classification to outgoing emails
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Thunderbird Security Classifier Extension

Provides support for labelling email messages according to Email Protective Marking Standard for the Australian Government October 2005

  • Provides menu's to select an appropriate security (and optional privacy) classification when composing emails and creating appointments
  • Adds appropriate [SEC=SECURITY:PRIVACY] marking to subject line
  • Adds X-Protective-Marking header
  • Checks outgoing messages have been classified and if not prompts to select a classification
  • Security classifications and privacy markings can be customised in the preferences dialog for the extension

Integrates with Conversations and Lightning extensions.