This seems to be an upstream issue: https://sourceforge.net/p/enigmail/forum/support/thread/e6db078d/?limit=25#c038
I had the same problem on Arch Linux. Jonas On Mon, 14 Nov 2016 21:11:28 +0100 Paul Gevers <elb...@debian.org> wrote: > Package: enigmail > Version: 2:1.9.6-1 > Severity: important > > On my up-to-date stretch setup, enigmail was suddendly broken today. Suddenly > enigmail shows me a pop-up: > > Enigmail: Error in accessing Enigmail service In order to use Enigmail, GnuPG > is required. If you did not install GnuPG yet, the easiest way to do this is > using the "Setup Wizard" button below. > > When I follow the wizard, taking the default answers, it ends with: > > Enigmail requires GnuPG for doing the cryptographic work. The wizard tried to > locate the GnuPG executable, but it could not be found. > Please locate GnuPG using the Browse button. > > When I point it at either gpg or gpg2 it complains: > The file you specified is not a GnuPG executable. Please specify a different > file. > > Please let me know if you need more info. > > Paul > > -- System Information: > Debian Release: stretch/sid > APT prefers testing > APT policy: (500, 'testing') > Architecture: amd64 (x86_64) > > Kernel: Linux 4.7.0-1-amd64 (SMP w/2 CPU cores) > Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/dash > Init: systemd (via /run/systemd/system) > > Versions of packages enigmail depends on: > ii gnupg 2.1.15-4 > ii gnupg-agent 2.1.15-4 > ii gnupg2 2.1.15-4 > ii icedove 1:45.4.0-1 > > Versions of packages enigmail recommends: > ii pinentry-gnome3 [pinentry-x11] 0.9.7-6 > ii pinentry-qt [pinentry-x11] 0.9.7-6 > > enigmail suggests no packages. > > -- no debconf information > >