I have recently installed the latest version of Thunderbird (60.3.0, 64-bit) on Ubuntu 18.04 from the Snap Store. I have installed the Enigmail addon and successfully imported my private key. On startup of Thunderbird a notification is displayed:
Your secret key [...] has missing trust. We recommend that you set "You rely on certifications" to ultimate in key properties.
After clicking “Certify” a notification is displayed:
No eligible key found for signing! You need at least one fully trusted secret key in order to sign keys.
How can I resolve this missing trust issue?
Following @dlakomski's advice I tried to change the trust setting on my private key (part of
~/.gnupg/pubring.kbx), but found it already to be set to
5 = I trust ultimately.
gpg> save Key not changed so no update needed.
Enigmail has found GnuPG in
/snap/thunderbird/29/usr/bin/gpg2 and “Override with
/usr/bin/gpg” is not an option (probably because Thunderbird was installed as a snap):
GnuPG cannot be executed with the path provided. Enigmail is therefore deactivated until you change the path to GnuPG again or until you restart the application.
Is it possible that
/snap/thunderbird/29/usr/bin/gpg2 is agnostic to trust settings of keys in