MajorDomo aliases do not work
This is a known bug for SD 3.5.
A workaround for this issue is to add the majordomo list users to /etc/mail/virtusertable manually and then recreate the virtusertable database by issuing the following command while inside the VDS:
makemap hash -r /etc/mail/virtusertable < /etc/mail/virtusertable
*This issue was added to the wishlist of the next SD 3.5 UP.