For some reason, it does give a message as the email has been sent successfully but it never arrives to your inbox, junk... no where! I´m using it on this blog:
I have been checking around and it seems to be a problem for many people. And the worst is that the developer does not provide with an specific solution.
Don´t understand how WordPress has listed this plugin. They should ask to the developer for a solution or remueve the plugin.
I´m not only disappointed with the developer, but as well with WordPress.