Debian :: Unable To Sign Emails With GPG Through Evolution

I get the following message when I try to send an e-mail with the option "PGP Sign" in Evolution:

Code: Select allCould not create message.

Because "gpg: skipped "67449612": No secret key gpg: signing failed: No secret key", you may need to select different mail options.

I have "Preferences > Mail Accounts > Edit > Security > OpenPGP key ID " set as 67449612, which is my subkey for signing, and this configuration has worked properly until two days ago when I upgraded a bunch of packages with evolution and gnupg among them. Since I am not sure this is really a bug or what package would it belongs to I am asking here first before submitting any bug.

I believe signing works and the secret subkey is "find-able" because I am actually able to do the following without any errors, and this is why I don't understand the error given by Evolution:

Code: Select all$ gpg --output random.sig --detach-sig random.txt

You need a passphrase to unlock the secret key for
user: "Rock Storm <rockstorm@gmx.com>"
4096-bit RSA key, ID 67449612, created 2016-02-21 (main key ID C96832FD)

$ gpg --verify random.sig random.txt
gpg: Signature made Sun 28 Feb 2016 11:47:47 AM CET using RSA key ID 67449612
gpg: Good signature from "Rock Storm <rockstorm@gmx.com>"

My gpg's keys configuration, notice that the "defaut-key" option in gpg.conf is commented out. This configuration worked for sending signed e-mails at least once before the upgrade.

Code: Select all$ gpg --list-keys rock
pub   4096R/C96832FD 2015-12-13
uid                  Rock Storm <rockstorm@gmx.com>
sub   4096R/7C2F5752 2015-12-13 [expires: 2018-03-12]
sub   4096R/67449612 2016-02-21 [expires: 2018-03-12]

[Code] ....

From the bunch of packages upgraded the ones I believe to be related to Evolution were the following:

Code: Select allgnupg:amd64 (1.4.20-3, 1.4.20-4)
evolution-data-server-common:amd64 (3.18.3-1, 3.18.5-1)
evolution-common:amd64 (3.18.3-1, 3.18.5-1)
evolution-data-server:amd64 (3.18.3-1, 3.18.5-1)
evolution-plugins:amd64 (3.18.3-1, 3.18.5-1)
libevolution:amd64 (3.18.3-1, 3.18.5-1)
evolution:amd64 (3.18.3-1, 3.18.5-1)

I searched current known bugs in Evolution and I could not find anyone related to this.

I tried downgrading it to the previous version but I wasn't able to downgrade every package related to Evolution. Curiously the previous version for some of them seems no longer available:

Code: Select all# apt-get -qq update
# apt-get -s install evolution-data-server=3.18.3-1
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Version '3.18.3-1' for 'evolution-data-server' was not found
# apt-cache show evolution-data-server | grep -i version
Version: 3.18.5-1
Version: 3.12.9~git20141128.5242b0-2+deb8u2

Anyway, downgrading only the following four packages did not resolve the issue, and I am still getting the same message in Evolution:

Code: Select allDowngrade: evolution-common:amd64 (3.18.5-1, 3.18.3-1), evolution-plugins:amd64 (3.18.5-1, 3.18.3-1), evolution:amd64 (3.18.5-1, 3.18.3-1) libevolution:amd64 (3.18.5-1, 3.18.3-1)
Current package's state:

[Code] ....