Whenever I forward an already signed email enigmail strips away the existing signature, whether or not I add my own. I would very much like to keep this existing signature, but I cannot find a setting for this in Enigmail. Is there any way to do this?
(I have Thunderbird 17.0.5 set up with Enigmail 1.5.1, running on Ubuntu 12.10 64-bit.)
See my reply on the mailing list.