Outlook by Microsoft is the application used by many people to view their emails (Hotmail, Gmail etc). It is an ad-supported product that is free for users. This means that they sell advertising space to keep the product Outlook free for its users. To use Outlook to view your emails without ads, you will need to pay for a premium service. Mater Lotteries are NOT directly emailing you these advertisements (ADS). They are coming to you based on your internet browsing history via Microsoft and their Partners.