When the form is used, the e-mail does not arrive. You will receive a notification that the message has been sent successfully. Inquired with the hosting company and this is their answer:
I’ve looked at the source code of the input form, and the reason it doesn’t work is because it uses PHP’s mail function. It is easier to use an SMTP connector from your Office365 mail server. Moreover, the emails will never be regarded as spam because the Office365 mail server is the official mail server of dilien.com.
Did the test with another hosting company and it works there.
Here you find the form:
How can I get this solution related to SMTP connector what they suggest. Didn’t eat cheese about this matter