Couldn't receive incoming messages to Outlook 2007 after installing NIS 2010

I have a 64 bit OS with VISTA, connected via FIOS (Verizon) to the internet.  After I loaded NIS 2010 today, I noticed that I wasn't receiving any incoming messages to Outlook 2007.  In order for me to see any incoming messages, I had to go to the verizon web mail.  I then contacted Verizon Tech Support and they said my computer (norton) was blocking all incoming messages.  So, since I only installed NIS 2010 today, I uninstalled it and the messages immediately came to Outlook.  Now, when I had NIS 2009 on my computer I didn't have to add any addresses to any list (because I need to get all messages from anywhere), but when I installed NIS 2010, I can't get incoming messages.  Is this a bug in NIS 2010?  I want a security product on my computer.  How do I fix this?