Redmine

I have multiple aliases configured to read emails from standard input. For one, I want anything sent to a given alias to be sent to a particular project and assigned to a particular group that's in the project. This is my invocation string (anonymized):

foo: "|cd /path/to/files && /usr/bin/bundle exec rake -f /path/to/files/Rakefile redmine:email:read tracker=Support project=myproject unknown_user=accept no_permission_check=1 assigned_to=MyGroupName status=New allow_override=tracker,status,priority,done_ratio,assigned_to RAILS_ENV=\"production\""

If I just send an email to foo@redmine this doesn't quite work; the issue is created in myproject but the assignee is blank. Now, if I send an email and include Assigned to: MyGroupName it works as expected: the issue is created in my project and is assigned to MyGroupName.

Environment:
  Redmine version                2.6.8.stable
  Ruby version                   1.8.7-p352 (2011-06-30) [x86_64-linux]
  Rails version                  3.2.22
  Environment                    production
  Database adapter               MySQL