[Tickets #12736] Automatic S/MIME encryption

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Ticket URL: http://bugs.horde.org/ticket/12736
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  Ticket             | 12736
  Created By         | azurit at pobox.sk
  Summary            | Automatic S/MIME encryption
  Queue              | IMP
  Version            | 6.1.4
  Type               | Enhancement
  State              | New
  Priority           | 2. Medium
  Milestone          |
  Patch              |
  Owners             |
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azurit at pobox.sk (2013-10-05 08:44) wrote:

Currently, there are two ways how to enable S/MIME encryption:
1.) Set is as default.
2.) Enable it by hand for every message which needs to be encrypted.

No one of it is perfect:
1.) You need to disable it by hand for every recipient without public  
key installed. Otherwise the IMP refuse to send e-mail.
2.) There is a pretty high chance that sooner of later you will simply  
forget to enable it and private data will be send and saved in clear  
text.

I suggest to create a new type of S/MIME encryption settings:
3.) Encrypt every message automatically when public key of all  
recipients is available. Display a warning  message (OK/Cancel) if  
public key of only part of recipients is available.