/boats_Insert.php page doesn't have an email server behavior on it, so it wouldn't send an email.
the next page it goes to seems to be /boats_Insert_images_free.php. That page has two email server behaviors, but the first one has a redirect, so the second one wouldn't send.
The first one should be trying to send, but I see that the first and second one have different credentials for the email server. Perhaps that is the issue.
If you can't figure out why it isn't sending, then I'd suggest a premier support ticket so I can do screen sharing with you and debug it, and I can show you how to properly debug email issues moving forward. It isn't something I can necessarily spot in the code since the issue could be in the server, database, SMTP server settings, Spam filters, or even DNS settings.