The first thing you should check is the email address because you’ve listed two different addresses here – one .org, the other .com.
Sorry–that’s a typo. The only email addresses are @churchoftheredrocks.com.
There are number of possibilities, but the plugin not generating the message is not one of them. Once the email is handed off to wp_mail(), there are a lot of things that could possibly go wrong.
Since it’s working with other email addresses (your own personal address), I wouldn’t necessarily start with issues on the send side, and would instead focus on receiver issues.
Start by checking the spam folder. If it’s not there, then it’s possible that it’s being rejected before getting there, in which case you want to find out if there are spam filter restrictions before getting to the email account.
There’s too much to list here, but there is an FAQ with links to additional info here:
http://rocketgeek.com/plugins/wp-members/docs/faqs/#email
The #1 improvement that I recommend to everyone is to use an authenticated SMTP account for sending email and set up wp_mail() to send through that account. There are a number of plugins that do that, some of which are listed on this post:
http://www.butlerblog.com/2013/09/24/troubleshooting-the-wp_mail-function/
