Make it super easy for visitors to subscribe to your mailing list! Add a RuleMailer newsletter subscribe widget to your blog.
RuleMailer is a state-of-the-art service for sending newsletters. This plugin places a subscription form on your WordPress blog, so that you can collect subscribers with no effort!
You can customize many types of settings:
To get started, you need a RuleMailer account. If you're not already a customer, then head over to RuleMailer to sign up. WordPress 3.0.