You need an email marketing service like Sendinblue that has the technical infrastructure for sending marketing newsletters to a large group of people.

http://images.google.fi/url?q=http://sunet.instructure.com/eportfolios/1520/

http://www.google.cc/url?q=http://mottcc.instructure.com/eportfolios/412/

http://images.google.nl/url?q=http://gilman.instructure.com/eportfolios/605/


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