On 26.09.17 11:45, digg...@openmailbox.org wrote: > Tested on: > Ubuntu 16.04 / Thunderbird 52.3.0 / GnuPG 2.1.11 / Enigmail 1.9.8.2 / > OpenPGP/MIME > Debian 8 / Thunderbird 52.3.0 / GnuPG 2.0.26 / Enigmail 1.9.8.2 / OpenPGP/MIME > Windows 7 / Thunderbird 52.3.0 / GnuPG 2.0.30 / Enigmail 1.9.8.2 / > OpenPGP/MIME > > All 3 were used to test sending and receiving > > The problem If I forward an email as an attachment and have enigmail encrypt > the sending email to recipient, when the recipient tries to open the attached > .eml file it appears blank in the thunderbird window. not even to / from / > subject info is displayed. Viewing source shows the content of the email > > Conversely if I forward an email as an attachment but do not encrypt the > email to recipient is able to view the email with out issue. > > This has been tested forwarding both encrypted and non encrypted emails.
When forwarding a PGP/MIME encrypted email as an attachment, then the email remains _unchanged_ by Thunderbird upon attaching it. That is, the attached email is still encrypted to yourself (and whoever else was on the recipients/sender) but likely not to the person to whom you forward the email. Consequently, the person who got the email from you cannot open it. If you want to forward a PGP/MIME encrypted email, you either need to attach it inline, or you need to create a decrypted copy of the mail, and attach that copy. -Patrick -Patrick
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