Hi there,
Thanks for using Caldera Forms, we’re glad you’re a part of our community.
As shown in our documentation about the email reply-to function, your emails will show as sent from the admin email with a reply-to email of the user pulling from the magic tag: https://calderaforms.com/doc/setting-caldera-forms-email-notification/
This is because if your server sent an email that says it’s “from” the user-submitted email, most email clients will mark this as SPAM and not deliver it.
This is one of the many problems the Pro version of Caldera Forms, Caldera Forms Pro, addresses with our enhanced email delivery. You can see more information at calderaforms.com/pro.
I hope this helps!