These given WordPress Plugins for Email Subscription will help you for email marketing and your site visitors will keep in touch with you for further blog posts and notifications.
Nmedia MailChimp Widget
You can create subscription form using Form Wizard Tool by using variables and groups from Mailchimp account. It is easy to use WordPress plugin and will be helpful for internet marketing.
WPNewsman is a light but powerful WordPress to create easy subscription methods and it is very easy to customize with the advance tools.
You can easily send newsletters to your site subscribers for each post on your WordPress blog. This plugin also allow you to send notifications or autoresponders in a beautifully way.
Mail Subscribe List
This is simple to customize and display the name or email from where users can acquiesce their info, you can easily control it in the WordPress admin.
Feedblitz Email Subscription
You can keep in touch with your site visitors by allowing them with WordPress Plugins for Email Subscription and Feedblitz would be one of the best tools for this purpose.
Feedburner Email Subscription
Make your WordPress site email marketing friendly with the use of Feedburner Email Subscription tool, it will allow your site visitor to enter their email on your site for subscription.