import MC = require('mailcheck'); var domains = ['gmail.com', 'aol.com']; var secondLevelDomains = ['hotmail'] var topLevelDomains = ["com", "net", "org"]; var superStringDistance = function(string1: string, string2: string): number { // a string distance algorithm of your choosing return 0; }; $('#email').on('blur', function() { $(this).mailcheck({ email: 'nonoptional@example.com', domains: domains, // optional secondLevelDomains: secondLevelDomains, // optional topLevelDomains: topLevelDomains, // optional distanceFunction: superStringDistance, // optional suggested: function(element: JQuery, suggestion: MailcheckModule.ISuggestion) { // callback code }, empty: function(element: JQuery) { // callback code } }); }); Mailcheck.run({ email: 'nonoptional@example.com', domains: domains, // optional secondLevelDomains: secondLevelDomains, // optional topLevelDomains: topLevelDomains, // optional distanceFunction: superStringDistance, // optional suggested: function(suggestion: MailcheckModule.ISuggestion) { // callback code }, empty: function() { // callback code } }); MC.run({ email: 'nonoptional@example.com', domains: domains, // optional secondLevelDomains: secondLevelDomains, // optional topLevelDomains: topLevelDomains, // optional distanceFunction: superStringDistance, // optional suggested: function(suggested: MailcheckModule.ISuggestion) { // callback code suggested.address === '' && suggested.full === '' && suggested.domain === ''; }, empty: function() { // callback code } });