NIS 2011 Upgrade Causing Email Problems for Recipients Replying to my email

Since I upgraded to NIS 2011 I have had almost everything that is incoming identified as Spam. Have been in settings tried making lots of adjustments without any success. Additionally people receiving my email are not able to reply using the emailI sent. They get an error message that just says Cannot Send. I have Vista OS, am using Windows Mail and before upgrade did not have any problems.

 

I have Googled, searched tech sites, forums, and I cannot find anyone with info that will help. Any help you can offer and/or suggestions would be greatly appreciated.

 

fromwaco