Newsletter Manager is a premium WordPress plugin by f1logic allows you to create and send html or plain text email newsletters to your subscribers. The plugin supports unlimited email campaigns, unlimited email addresses, double opt-in anti-spam compliance, hourly email sending limit and much more. Opt-in form is available as HTML code, shortcode as well as standard WordPress widget. The import/export tool allows to create and restore backup of your subscriber list.
Download: http://wordpress.org/extend/plugins/newsletter-manager/
