I'm using googlemail as IMAP-account and Outlook as client on a windows7-system.
I wanted to test mailencryption an installed GPG4win (GNUPG, GPA, GPGOl).
Encryption and decryption works fine everythings perfect. BUT: Mails disappear
in outlook after beeing decrypted. I found, that there is created a second mail
containing the clear text and the encrypted text. These two mails (original an
new) are combined by google to a conversation. I think this is why outlook
doesn't recognise the mail any longer.

Is there any possibility to solve this problem an prevent this second mail to be
created?