R.T.F.M. – A hitchhiker's guide to IT

When sending an encrypted message from Microsoft Office Outlook 2010 to a recipient using a third-party email client, such as Lotus Notes, Entrust, SeaMonkey, or Thunderbird, the recipient may not be able to read the encrypted message. In the case of the Thunderbird email client, it may display the following message in the body of the message [...]