Universal email not receiving form submissions

We have created a registration form for a client. We have included ourselves in the BCC of the submission email and we do get the submissions, however, the client is not getting them. I've attached the files. Any direction would be appreciated. - Erick

Are you talking about the page: register-free.php

I'm not sure why the other pages were included, but they don't appear to be used for sending an email for registration.

You have two emails on that page. Which recipient says they aren't getting the email? Only the first email would send on that page since it has a redirect... the second one wouldn't have a chance to send.

so sorry. The relevant pages are attached. It seems like a @msn email or @gmail emails do not work for the "To" and "From" in Universal Email? We used a work around for this situation, but moving forward curious to know what we need to do for the best results? Thanks for your help!

msn and google have very strict SPAM filters. It is going to know that it isn't actually FROM those accounts if it comes from your server. You should be sending emails from your domain using the same domain as your website if you want to improve deliver-ability. You also need to make sure your reverse dns, dkim, spf and dmarc work properly.

You can use a web page to send an email to a spam checking service like: https://www.mail-tester.com/

It will inform you of what is wrong with your email and how to improve it so it will get through SPAM filters.