Guest WiFi is a powerful tool for collecting customers' details. However, Guests might mistype their email. Or worse, type some random strings as email.
Using Spotipo, you can reduce such instances by turning on the "Email Domain Verication" feature.
While on your site, navigate to Settings -> General Settings and turn on the Verify Email's domain.
Once enabled, spotipo will validate the email address and show an error.
Spotipo validates if a domain exists and has a valid MX record. It doesn't validate if this email address exists.