This feature is available as a Partner-wide or market-specific setting that partners can turn on or off. Here is how;
Step 1: From the Partner Center, navigate to the Administration tab
Step 2: Click on Customize
Step 3: Click on Email Settings > under 'Product Activation Email Settings', uncheck the box next to 'Email SMBs'
- Switch to the Markets tab, select a market, and repeat the same steps for additional markets.