A spam email was recently send to members of the MDRA Forum. The user had been removed from the forum.
The spam that was sent was done by a person not a computer. This person registered as a member and sent out emails to each user. You could do the same.
There is no way to stop all spam.
In your profile you can set "allow members to send you email" to no. This should greatly reduce the possiblity of getting spam via MDRA Forum.