This bug was fixed in version 1.6 of enigmail in October 2013. Unfortunately 1.6 is still not available in Ubuntu.
See also: https://bugs.launchpad.net/ubuntu/+source/enigmail/+bug/1296699 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1269388 Title: Unable to send signed e-mails with Thunderbird/Enigmail To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/enigmail/+bug/1269388/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
