(Node.js) Read Gmail POP3 Mailbox

Reads the header for each email in a GMail POP3 mailbox and displays the FROM and SUBJECT header fields. In your GMail "Forwarding and POP" settings, be sure to select "When messages are accessed with POP keep Gmail's copy in the Inbox".

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.

    // The mailman object is used for receiving (POP3) 
    // and sending (SMTP) email.
    var mailman = new chilkat.MailMan();

    // Set the GMail account POP3 properties.
    mailman.MailHost = "pop.gmail.com";
    mailman.PopUsername = "myLogin";
    mailman.PopPassword = "myPassword";
    mailman.PopSsl = true;
    mailman.MailPort = 995;

    // Read mail headers and one line of the body.
    // To get the full emails, call CopyMail instead (no arguments)
    // bundle: EmailBundle
    var bundle = mailman.GetAllHeaders(1);

    if (mailman.LastMethodSuccess !== true) {
        console.log(mailman.LastErrorText);
        return;
    }

    var i = 0;
    // email: Email
    var email;
    while (i < bundle.MessageCount - 1) {
        email = bundle.GetEmail(i);

        // Display the From email address and the subject.
        console.log("From: " + email.From);
        console.log("Subject: " + email.Subject);

        i = i+1;
    }


}

chilkatExample();