Compared to all other forms of marketing, email marketing is one of the cheapest methods of marketing products and services both offline and online. As a result of this, it has been misused by spammers who collect addresses from various sources and send millions of emails on irrelevant products.
However email marketing can be very effective if done properly. There are thousands of companies the run their whole businesses on legal and requested e-mail advertisements. The key to success is to compile a list of people/companies who will be interested in receiving the email advertisement.
