# dpkg --purge vboxadm-sa
(Reading database ... 188342 files and directories currently installed.)
Removing vboxadm-sa ...
dpkg: error processing vboxadm-sa (--purge):
 subprocess installed pre-removal script returned error exit status 100
Starting VBoxAdm SMTP-Proxy:SMTP-Proxy disabled in /etc/default/vboxadm-sa
.
Errors were encountered while processing:
 vboxadm-sa