(Node.js) Send Email to Distribution List

Sends the same email to a list of 1000 email addresses in 50 sends where each email has 20 recipients.

Note: Chilkat is not intended nor designed for mass emailing. A solution such as this might be used for a corporate emailing to employees, or an emailing to newsletter subscribers.

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

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var mailman = new chilkat.MailMan();
    var success;

    mailman.SmtpHost = "smtp.mymailserver.com";
    mailman.SmtpPort = 465;
    mailman.SmtpSsl = true;
    mailman.SmtpUsername = "myUsername";
    mailman.SmtpPassword = "myPassword";

    // Create a new email object
    var email = new chilkat.Email();
    email.Subject = "This is a test";
    email.Body = "This is a test";
    email.From = "Senders Name <sender@example.com>";
    email.AddTo("Subscribers","subscribers@example.com");

    var bdMime = new chilkat.BinData();
    mailman.RenderToMimeBd(email,bdMime);

    // Load a file containing one email address per line.
    var distList = new chilkat.StringTable();
    success = distList.AppendFromFile(1000,"utf-8","qa_data/distList.txt");
    if (success == false) {
        console.log(distList.LastErrorText);
        return;
    }

    var sbRecipients = new chilkat.StringBuilder();

    var i = 0;
    var szDistList = distList.Count;
    var j = 0;
    while (i < szDistList) {

        // Build a list of comma-separated recipients.
        if (j > 0) {
            sbRecipients.Append(",");
        }

        sbRecipients.Append(distList.StringAt(i));

        i = i+1;
        j = j+1;

        // If we have 20 recipients, or we have the final recipient in the final chunk, then send.
        if ((j == 20) || (i == szDistList)) {
            success = mailman.SendMimeBd("sender@example.com",sbRecipients.GetAsString(),bdMime);
            if (success !== true) {
                console.log(mailman.LastErrorText);
                return;
            }

            j = 0;
            sbRecipients.Clear();
        }

    }

    success = mailman.CloseSmtpConnection();
    if (success !== true) {
        console.log("Connection to SMTP server not closed cleanly.");
    }

    console.log("Email sent to distirbution list.");

}

chilkatExample();