Are email attachments scanned on access..

My ISP have receintly changed port #'s for outgoing & incoming mails & both now use SSL so my NIS no longer automatically scans emails due to these settings, I'm advised that I'm still protected but am reluctant to believe that I'm protected in the same way as previously. I'd like to know whether I need to save any attachments to the computer, then scan them or whether NIS still scans attachments if I click on/open one within OE/WLM?

 

Thanks in advance.