Mailing List type Plugin for Wordpress

I am in Search of a Plugin for a Wordpress Blog
Is their any Single Plugin which can do this thing ?
1. When anyone Post a comment that user get subscribe to the Blog and gets and Email Notification
2. The User can manage its subscription its self also
3. Administrator can add and delete Subscriber
4. When Administrator of Blog Post any new Post the Subscibed User get an Email Notification of New Post
&
5. Also their should be a Separate box for users to subscribe (means to subscribe without posting)

Help me to find out