Forms not emailing results

I’ve created two contact forms that are hosted on our Wordpress-based websites. We have a separate installation for each of our two sites and we have the same issue on both. When a user fills out the forms, the information is captured in the database (I can log in a see everything that was entered into the form and stored) but despite having a Send Form Results action set up to email the information to us, we never get it. Is there something else I should have configured that is causing us to not get these emails? What should I be looking into?

Many thanks.

I had a similar issue and this topic helped me: https://www.mautic.org/topic/no-emails-are-being-sent/