"How do you know if worms arent attached to them?" 
Mailwasher shows the size and only previewing doesn't open attachments. 

"Any site these days sells off their list for the money."
I know for fact the stores I sell at including Content Paradise, Vanishing Point, Dark Anvil, Netherworks and Cornucopia doesn't. 

Some of these stores will not even provide email addresses to vendors for support issues as their privacy policy is that professional strict. I'd assume most other Poser stores would be the same as well.
 
If you found XYZ's poser model store, despite a privacy policy, was selling your email address to a list broker would you buy from then again ?   

Pinky - you left the lens cap of your mind on again.