This plugin is a simple newsletter plugin. It can show opt-in form, save opt-in email and name, and send emails to your opt-in list. It also have import and export email data ability. You can comment and ask about the plugin here.
安装:
Upload the plugin files to the /wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress.
You can see the stat at "settings" -> "stat" menu.