See this message from test bug 477768. Even if you can't decipher it (I cannot do it either), the package dump shows that it is encrypted for key 94BFDF4484AD142F (which is the main key with capabilities CS), not the encryption subkey F1676D15B67892BF. Gnupg (2.0.20) is unable to decrypt the resulting message. -----BEGIN PGP MESSAGE----- Version: Crypt::OpenPGP 1.03 hQIMA5S/30SErRQvAQ/9EkXfX6PcQPgADZUFIAX9MABBi0igRHOg8YIPnjt+hHfz YioXIU+gs6x4d8nNR3qr3fmsKXJMoUpCR+uwYPqsY31WsNLphpk9NSfWsoSCj+q1 KjtgGUKldyQbVXFrH+iI62KOJoM710V/MK+VYTvBUkVqLxf1RE5wLgbk3XQ/HDxy nHvusxiNl268njHpUPIJJ9Mp9k0k5giULTyzCIl2dcvv8p5jCMTqrIDtk95AqX0s 7pDl6SEnfX1mlLaeJx2hrssyPtpQWIPmqMdJxUIJUg3Xb1kTrK85waew2nOzbOpb 9oDCZtOZHTJ6jIJRqyO8Q2VAQJ1iV/iPjrVAXr0c5SngfwwX7/jAUcDz25rPTMJP RmVqOJYDZgHoPn4Qc7nbwZ56yU1hDMkL9TuOygc5vAGfaXFXibDzWZzPwzqJ9QHO Gu6QhrhPk6y2s+3wqQT/gogolbz6MrZ1ZsSyrTB81CcrAQ8R6Hu3e1nwPWRCFPZG bFhwhz/CMwnMD7Ic3BijULRnAxYMUIsX7tCxhI0EUdqeY7WsYjkqPCZchglyrGiA We9wKLHt4qh+W7miPGEpNQKdHZzpr93yfYxbBPkOxOrM3800UVEZ4TTzZ/snj0RC GrruYt0UFw5V2wN0lixbeL33ICfKlEM/NOXVX7pkjlK0h719ofumhGepTIXYKlKl Avy0tlHjOYcSksJ8294bB5VisH7NsyOqhSqksemhOOsUTRbTqmTxP+E4S2JPtX6G n61CpGKgpLp/gXRb/WlWM0I/s8CMdh+VU7wctNCTAhEkwmdtzWo0Kn44jdeC+dfw vCFJjwXxRt82HiZT9QLsx2BmLMhuHqtcldkrNMTwvJ97oy4p4ZDzVySiAlLlI6SB HCLF82Gu5M3KA1mBEHMXD9ebCz6jbKpplbP0Vgp5OkO94NkMa+Cm8rWAAo8+ToVE OrNTzqYSdFHuP6ZrJKNiTekO8uTNMKsAPnQqtz3YZmDjq2IqielBigyAx4IkYc7D 2qOfMkt1DTV/yO2AicIzqIJqYlSAAcz5FBr9IYJgYjd+O+8EEH9USj9XZMvRymE/ lwiY/1Gs0Tp8oHUhObstIsSkrxbHPxJsrgcdYIecEtLfIJkFnsGYzK2LkXQMe6zj 0bPXRf9wVc47/2jsw2AMviHfnrQZikJ49HIFO/pGrElSgiJN12knsPZtFjHCux0K Cc1q00f/QIzirVHjk1b191g3feK3A4wbIhpbGrDu74jh5NLbvNphAViUGXaSB5n6 fZN+SubgLnh1BdnTmIPr7vHIcfxkzCtObpUDWvK2oZHvs5rAuUpFQC0LzFkUc+/Z TVFd8D7WkqoYAldLE+x/Yra0uT964w/4KdVE6yAnHyIy/6AB+Wl7kiaGMSAna/yx WraaAU1j19nyDlXRQB+E8nyEi23BBJGWEd86fdl1YgAK7JZ8WAKW2DWWzJntVvrf U5rFtQih5POmTXvOhMfhiTjCG+pETGTuhie1sjTkcT+8S4oYzccjRfg7zqdrNzo7 arUad1brtlDR6rKGMVO4pn/OxFd4LrP0bUDTCQqyl7Cty7B5g1mbOVIF/NYn0Wfy fLCfx+asUvq/9Y6UhTFkoA2n6JMzk3GPqpxNmDTjD0MMzDqep5NyWWPQ1WH4JXO/ 7SW4CQuQpd2iiNqX0ng55o2U3FxBfLi7AJ4RZxq5lt80bfVuWNtiBYpFJ396aw== =HKPV -----END PGP MESSAGE-----
I don't think we do this broken secure mail thing anymore. Please reopen if you can still enable it somehow.