Form stack email is not arriving

I am using the stack Form or Form Pro and publish the page, I put my email information and checked “use my email”. Get the message “Successful, email sent”
The mail does not arrive. What did I do wrong. Please help

Check the spam folder to make sure it didn’t end up there. Additionally make sure that the email address you’re using shares the same domain as your website. And finally — Your host may require that you use the SMTP server. It is always recommended that you use your SMTP server.