Macs 'are' relatively safe in the PC world, but the spammers don't really know that an email addresss leads to a Mac. Most of the viruses won't hurt a Mac, but the spam will wear us all down!

Some spam gets thru by the process of trying every combination of email addresses their robot programs can imagine, and some email addresses are manually harvested and gradually worked into the system. The spammers are like ants, roaches, mice and other vermin...it's hard to devise a system to totally keep them out.