sent mail sporadically double encrypted?

[s a harp]

At unpredictable times, outgoing mail in PGP/MIME format will be transmitted in a form that cannot be decrypted by the intended recipients. This happens about once or twice a month. I'm currently seeing this with Enigmail 1.4.5 on Thunderbird 16.0.1 on MacOS-X 10.7, gpg (GnuPG/MacGPG2) 2.0.17, but I've seen the same problem on Linux with older versions.

The outgoing message, as encrypted for the intended recipients, appears to get packaged in another layer of encryption, keyed only for ME. Needless to say, the recipients get the "secret key needed to decrypt message" error. While I can "decrypt" the sent mail, I just see another block of encrypted.asc message. If I save that to a file, I can sometimes decrypt it from the command line, other times gpg complains:

 gpg: malformed CRC
 gpg: encrypted_mdc packet with unknown version 255
 gpg: quoted printable character in armor - probably a buggy MTA has been used

I did enable the debug log in the hopes this might trap some interesting message, but unfortunately it appears to be overwritten each time TBird starts? It would seem that unless I check each outgoing email for correct encryption, I won't be able to trap anything this way.

Any theories on how to debug this?

[Patrick Brunschwig]

Please send me an example of such a mail (even if I can't decrypt it) to < patrick AT enigmail.net >

[Patrick Brunschwig]

I created bug [#142] for this.