Required fields validation inside page

Hello,

I’m using this plugin to insert the registration form I created in Mailingboss directly into my WP site. The integration is working fine; however, whenever I click the submit button without filling anything to the e-mail field, which is required, it redirects me to mailingboss’ page and only there will the user be notified about the field being mandatory.

So I wonder is it possible to include validation already inside my page for the required fields? Even browser itself already has this feature, provided the input tag has “required” on it, but the plugin is not bringing this to the page.

Any help here is appreciated. Thanks!