1) Log in to Gmail, click on the gear icon.
2) Click 'See all settings.'
3) Select 'Filters and Blocked Addresses.'
4) Click 'Create a new filter.'
5) Input 'MLSTECH@southwestmatrixmail.com' in the 'From' field, and then click 'Create filter.'
6) Check the 'Never send it to Spam' tickbox, and then click 'Create filter.'