Enhance the privacy of the emails
Protect against all kinds of HTML issues
Support Tor's prop 171
Add new TODO items

These bugs must be fixed in Thunderbird:
  https://bugzilla.mozilla.org/show_bug.cgi?id=684035

Required reading:
  https://lists.torproject.org/pipermail/tor-talk/2011-September/021398.html

Mixmaster/MixMinion integration - eg: "write anonymous email" button
https://trac.torproject.org/projects/tor/ticket/6020

Open Tickets for TorBirdy:
 https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=TorBirdy&order=priority&col=id&col=summary&col=component&col=status&col=type&col=priority&col=milestone&report=27
