$('form').submit(function (event) {
        var email = $('#email').val();
        $.getJSON(
            'https://email.perfectvalidation.com/api/validate/' + encodeURIComponent(email) + '/'
        ).done(function (info) {
            if (info && info.Summary) {
                // you may want to adjust thresholds according to your needs, default is 0.1
                if (info.Summary.validity > 0.1 && info.Summary.deliverability > 0.1) {
                    // the email is valid
                } else {
                    // the email is NOT valid
                     switch (info.Summary.errors[0].code) {
                         case 1: /* email address must contain @ */ break;
                         case 2: /* mailbox is not specified before @ */ break;
                         case 3: /* domain is not specified after @ */ break;
                         case 4: /* invalid domain name */ break;
                         case 5: /* invalid mailbox, see info.Summary.errors[0].message for more details */ break;
                     }
                    event.preventDefault();
                }
            } else {
                // something went wrong during the API request, consider valid
            }
        }).fail(function () {
            // something went wrong during the API request, consider valid
        });
    });