eMail Domain Check Processor for Caldera Forms

In a nutshell, minimizing misuse of bogus eMail domains like "njgaay.xzy" or mistypted eMail domains. Situation, a customer wants to get in touch via a contact form with an eMail adresss field. This processor checks for DNS records that point to a valid eMail server for the eMail domain given. With this check, you can minimize bogus domains that eg. have been mistyped or misused and no eMail can be sent/replied to. A requestor is enforced to check his eMail address without complex measures. Helps minimizing the misuse of the contact form. It is most likely but not set, that missing DNS records will prevent recieving eMails for the domain given.

The check is made with php checkdnsrr to look if the eMail domain returns either a valid DNS MX or A or AAAA record, in this sort order.

This plugin can only check if the eMail domain is likely to recieve eMails. By nature how eMail was defined, there is no easy and secure way to find this out. But the majority of servers do have a proper MX or A or AAAA record that highlights the possibility that this server can process eMails.

If the server can recieve eMails, it is still possible that the recipients name is mistyped or unknown.