I just installed gpg4win 2.2.4 and sent an encrypted mail from outlook to kmail
4.13.3. Kmail failed to automatically detect that mails as decrypted and hence
fails
to decrypt the message. By comparing the message sources of that outlook mail
and
another mail that gets decrypted I found the following differences in the
emails'
sources:
Begin: Excerpt of encrypted mail from outlook
Content-Type: multipart/mixed;
boundary="_005_6AFB03C966D5AE4089C8532D1C9DB5580E45CE3BA6ZDE070lenzeco_"
MIME-Version: 1.0
X-Brightmail-Tracker: [..unimportant for that bug..]
X-SpamAssassin: $spamass_status
--_005_6AFB03C966D5AE4089C8532D1C9DB5580E45CE3BA6ZDE070lenzeco_
Content-Type: multipart/alternative;
boundary="_000_6AFB03C966D5AE4089C8532D1C9DB5580E45CE3BA6ZDE070lenzeco_"
--_000_6AFB03C966D5AE4089C8532D1C9DB5580E45CE3BA6ZDE070lenzeco_
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
-----BEGIN PGP MESSAGE-----
Version: GnuPG v2
End: Excerpt of encrypted mail from outlook
Begin: Excerpt of encrypted mail from kmail
MIME-Version: 1.0
Content-Type: multipart/encrypted; boundary="nextPart1818673.gpSnp61kLK";
protocol="application/pgp-encrypted"
X-User-Auth: Auth by k@d. through .*.*.***
--nextPart1818673.gpSnp61kLK
Content-Type: application/pgp-encrypted
Content-Disposition: attachment
Content-Transfer-Encoding: 7Bit
Version: 1
--nextPart1818673.gpSnp61kLK
Content-Type: application/octet-stream
Content-Disposition: inline; filename="msg.asc"
Content-Transfer-Encoding: 7Bit
-----BEGIN PGP MESSAGE-----
Version: GnuPG v2
End: Excerpt of encrypted mail from kmail
As you can see, GPG OL fails to set the Content-Type to "multipart/encrypted;
boundary="..."; protocol="application/pgp-encrypted" but uses "multipart/
mixed;"
instead.
Probably those other two "nextParts" are required, too, for automatic detection
and
decryption.
If you need financial support to allocate resources for fixing this, contact
me,
please. (That option is only possible until October 2015!)