Hello,
– My suggestion would be changing the server to another one (we use a2hosting and recommend), or try using Gmail as sender.
First make sure to have a gmail.com account created and with the option for allow less secure apps access enabled, like I explained in my first reply.
With your @gmail.com username and password in your hands, go to “php/contact-form.php” (or the php file you use) and change this:
To this:
* Change YOUR_GMAIL_USERNAME
with your @gmail.com username.
* Change YOUR_GMAIL_PASSWORD
with your @gmail.com account password.
Please try that and see if you get the email, just to make sure the error is in the server that is blocking the email.