Hello,

If you using Contact Form 7 plugin, please read more some guide below:

please check again your contact form in backend, see image example below:

1, http://www.awesomescreenshot.com/image/797162/3826c60eb37f57c5764e8ae027479efb

2, http://www.awesomescreenshot.com/image/797163/f9977b8769aa9ed38e540ad385111bc0

And make sure:

https://writenowdesign.com/blog/wordpress/wordpress-how-to/contact-form-7-doesnt-send-email/

Thank you