Email Marketing Software refers to a computer application which provies the ability to send bulk email to target audiences. The intent is usually to send newsletters or promotional materials to opt-in lists of subscribers, although the software can be used to send unsolicited email. The software typically includes a database that stores contact information, campaign statistics, and message history. The interface provides features necessary to run an email campaign, such as message sending, contact entry, contact importing, and reporting. Software packages range in price from free, to about five hundred US dollars. Some companies charge a monthly fee. There are also enterprise solutions that can cost thousands of dollars a month to manage large enterprises mass marketing email campaigns.