(Node.js) Transition from MailMan.MxLookup to Dns.Query

Provides instructions for replacing deprecated MxLookup method calls with the Chilkat Dns class.

Note: This example requires Chilkat v11.0.0 or greater.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    var mailman = new chilkat.MailMan();

    // ...
    // ...

    var emailAddr = "joe@example.com";

    // ------------------------------------------------------------------------
    // The MxLookup method is deprecated:

    var domain = mailman.MxLookup(emailAddr);
    if (mailman.LastMethodSuccess == false) {
        console.log(mailman.LastErrorText);
        return;
    }

    // ------------------------------------------------------------------------
    // Do the equivalent using the Chilkat DNS class

    var dns = new chilkat.Dns();

    var json = new chilkat.JsonObject();

    // This gets all MX domains for an email address.  (Typically one domain.)
    // The preferred domain will be at index 0 (see below).
    var success = dns.Query("MX",emailAddr,json);
    if (success == false) {
        console.log(dns.LastErrorText);
        return;
    }

    var i = 0;
    var count_i = json.SizeOfArray("answer.mx");
    while (i < count_i) {
        json.I = i;
        domain = json.StringOf("answer.mx[i].domain");
        console.log(domain);
        i = i+1;
    }


}

chilkatExample();