Emails bring visitors to the site and provides means of keeping in touch with volunteers, voters, donors, and members of the media. There are certain criteria and considerations that you may be aware in order to have a more effective communication and impact on your potential voters or media.
Many people weight a recommendation more from friends or family. When a large number of visitors send messages to their friends, family and colleagues suggesting your website, it increases your credibility. In order to encourage this grassroots support, you should provide a feature that allows visitors to easily and quickly send emails to friends from your site.
According to Seth Godin, "Permission Marketing" is a very good strategy because it is designed to attract people to a message they want to hear.
Technology convergence – the statistics
90% of the 200 billion emails sent each year are spam
http://loveoftechnology.wordpress.com/2010/03/24/technology-convergence-the-statistics/
Newsletters
An important aspect to online campaigns is to maintain communication and give a reason to come back. Once a person has made a contribution, gives their contact information or signed up as a volunteer, they should receive periodic updates from the campaign.
The Newsletters should be short, well written and simple.