For quite a while, emails sent from this server were going nowhere. This is because of strict (and often overzealous) spam mitigation policies by major email service providers including Google and Microsoft.
Today, I set up a new dedicated email account to handle outgoing emails sent from these forums and also the main site's contact form. As a result, you should be able to receive private message notifications and, if you need to reset your password, you'll actually get password reset emails again.
It costs a little more money to have a dedicated email account for this but I think it's worth it.