PGP Viewer does not decrypt emails from Outlook 2010
i am using PGP Desktop 10.2.1 (currently in limited use mode) and Outlook 2010 with all recent patches (Windows 7 x64).
When using PGP viewer dragging and dropping of emails from an IMAP Outlook folder does not work. The following error message pops up: "PGP viewer failed to decode specified data. Error: Not a mail message".
When opening the PGP viewer inside the PGP desktop interface the error message looks a bit different: "PGP viewer was unable to open "dummy1.msg" Error: Not a mail message".
Saving .msg files to a folder and opening it in PGP viewer does produce the same error messages.
Installation of keys etc. is correct since decrypting PGP text in the clipboard works fine.
The scenario with PGP viewer worked perfectly for my old installation with PGP 10.1 and Outlook 2007.
Any ideas how to solve the issue? Any help is very much appreciated.