Send your subscribers SMS messages when you publish a new post.
Check that the email service from your WordPress site is working. One way to do this is to log out then try using the "Lost your password?" link; if you don't receive the email, then you may have a problem with the ability for WordPress to send email.
The most common email sending problem with WordPress is that the default "from" email address is "wordpress@[your domain here]", which is an address that often doesn't exist. Here are a few things which you could try to fix the problem:
If all the above fail, and your WordPress site is not sending any email, you could try hitting the forums where there's a bunch of super helpful WordPress people, just like you. Make sure you explain your problem clearly and detail what you've tried (without including any login information).
If your WordPress site is sending the forgotten password email, but your SMS notifications aren't arriving, please email us.
If you know of a gateway we haven't listed, please email us.