Sensitivity Header ਮੁੜ ਤੋਂ ਚਾਲੂ ਕਰਨ ਦੀ ਲੋੜ ਹੈ

Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
This allows the user to select Private / Personal / Company-Confidential (or none) for an outgoing message.
No longer maintained: See below.