Question about Outlook Express

I am getting at least 5 emails a day from canada **** re viagra, they go to my junk mail but i have lots of emails a day and im afraid im missing some because i am just deleting the junk mail cause of these annoying viagra emails! I report them as phising every time and block the domain and sender but they are a new domain and sender each time. Its driving me insane and i dont want to have to change my email address cause i have a lot of accounts under it. HELP

I get emails from express **** for viagra and ****, from women with all different names offering ****, and today I got four emails from guaranteed ****. They all go into my junk mail, but I don't even want to see these things. I started getting this stuff when I was automatically changed from hotmail to outlook and when I changed back they just kept coming. Have no idea whether the change had anything to do with it or if it was just a coincidence. There must be something I can do. Thanks.