Email Marketing
Wikipedia: E-mail marketing is a form of direct marketing which uses electronic mail as a means of communicating commercial
or fundraising messages to an audience. In its broadest sense, every e-mail sent to a potential or current customer could be considered e-mail marketing.
Publications > Email Marketing by the Numbers by Chris Baggott > The Truth about Email Marketing by Simms Jenkins > Email Marketing for Complex Sales Cycles by Winton Churchill > 2008 Email Marketing Benchmark Guide by MarketingSherpa > Email Marketing Kit by Jeanne Jennings