Tried setting it to the admin email address, the same as in the wordpress settings.
When the form successfully submits, I receive notification, and it appears in the responses section. When the form doesn’t successfully submit – and the page of code appears, there is no trace of it.
I can’t work out what causes the form to not work, doesn’t seem to be any reason for it, but of course this is an issue, as I can’t have my contact form sometimes not be working.