The 32 or 64bit platform makes no difference as far as spam is concerned. With Outlook or O.Express it still comes through the ISP's mail server. Some services will have a report spam address for forwarding the spam mail and compplaints about it to them.
The block sender but more effective "block domain" option is found online at your account there. But the list will fill up fast and never seems to prevent more from coming despite how many return addresses are blocked. There's spme news reports lately stating that Congress is pondering on passing legislation to go after spammers. We'll have to see if that ever passes?!