Why is Contact form 7 not working?

Question

WordPress

I fill in all the fields, but displays an error


In the Notification when submitting the form it says
"Notification of an error sending a message"


That's what I wrote in the template

<label class="booking__name_title"> how can I call you  
[text* your-name class:booking__name_input placeholder "Please write your name"]
</label>

<label class="booking__telephone_title">phone number    
[tel* your-telephone class:booking__telephone_input placeholder "+380 (--) (--) (--) (---)"]

</label>
<label class="booking__details_title">Write us the details of your order   
[text* your-details class:booking__details_input placeholder "Table on Tuesday, October 12 at 18:00 for 2 people"]

</label>


[submit class:booking__btn "Reserve a Table"]

In the letter I wrote like


this. I connected the form itself through this shortcode

Answer 1

contact the hoster, it is possible that your hosting account is not allowed to send emails

Answer 2

1. In the "From" field, try to enter [email protected]_site
2. If it does not help, then leave this field empty and try sending.
3. Does F12 debug mode cause any errors?
4. Try to insert other mails other than gmail.com in the "To" field.
5. Put the Google recaptcha and look at the result.