The muttator's commit https://github.com/vimperator/vimperator-labs/commit/c597b0afbc487ec9c0b4598042ca0a6602a22771 seems to solve this problem.
Unfortunately, the latest release available to be installed is 1.2. To use this functionality, you must make the plugin by your self.
It is easy as pie, I just clone the vimperator repo and run make in the muttator folder. This leads me to a xpi file to be installed in thunderbird.