I am using Windows Live Mail and although I am sending some email address's to the blocked sender list I am still receiving mail from them even though I've blocked sender and domain.

Two in particular are "someone @app.topica.com and someone @masterpromo.co.uk"

They just alter the prefix each time. I am receiving about 10 junk mails a day.

This problem only started about 3 months ago so something seems to have made my email address common knowledge.

Is there anyway to stop these emails?