Several times per week, my email contains "Nigerian Scam" offers, and emails related to other types of scams. An easy way to get rid of that email without reading it is to set a filter so that it is automatically deleted. Simply open your google email. Next to the search box is a link which says "Create a Filter". When you click on that link, you get a box which says "Choose Search Criteria". The first choice in that box says "From". Type the country codes for the country from which you do not want to receive email. Click on "Next Step" and check the box marked "Delete It". For a list of country codes follow this link.