Reply To: Ad Blocking by Norton Antivirus or Norton Firewall 2004 [bsa_pro_ad_space id=2] November 11, 2003 at 7:06 am #641397 AnonymousInactive You’re being blocked by NIS 2003, so I assume NIS 2004 and/or NAV 2004 will also block you. And if that’s not bad enough, NIS often tags legitimate emails as spam as well.