How do I stop MatKings.com emails from going to spam?

Detail:

Step 1:

Open a web browser and go to your mail site
like Gmail Yahoo Apple/iCloud
or Open your email app your mobile device

Step 2:

Open the Spam/Junk folder

Step 3:

Select any MatKings.com email in the Spam/Junk folder

Step 4:

Click 'Not Spam' or 'Report as Not Spam' or similar option