VM scheduled backup does not send emails

I have been trying to debug a clients server on this and I do not see anything wrong -- the backups are made and uploaded but no emails are sent out at all.

I ran /etc/webmin/virtual-server/backup.pl at console level with no success either.

I thought everything was ok when I got a email of the backups a day ago but that was the only one I had gotten so something is wrong still.

Any help you can give me?