If you are doing this verification on the client-side, you can restrict form submissions when a user enters a free email address like Gmail or Yahoo. Here's a

If you are doing this verification on the client-side, you can restrict form submissions when a user enters a free email address like Gmail or Yahoo. Here's a post I wrote with an implementation of this approach (specific to Marketo forms, but can be made generic for any form): http://developers.marketo.com/blog/restrict-free-email-domains-on-form-fill-out/ http://developers.marketo.com/blog/restrict-free-email-domai... I would also recommend labeling the email address field on the form, "Work Email."