Contact Form was not working – are emails archived?

I just realised that my Contact Form (created with the included Contact Form with the Enfold theme) has not been working for an unknown period of time. I have managed to get it working again using the wp-email-SMPT plugin, but I want to know if there is any way to retrieve emails that were sent via the form and not delivered? There will be some really important stuff in there so I am hoping they are archived in some way and can be retrieved. Very grateful for any support here. Thanks!