(Node.js) Download Unread Email from IMAP Mailbox

Download unread email messages from an IMAP mailbox.

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 success = false;

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

    var imap = new chilkat.Imap();

    // Connect to an IMAP server.
    // Use TLS
    imap.Ssl = true;
    imap.Port = 993;
    success = imap.Connect("imap.example.com");
    if (success == false) {
        console.log(imap.LastErrorText);
        return;
    }

    // Login
    success = imap.Login("admin@chilkatsoft.com","myPassword");
    if (success == false) {
        console.log(imap.LastErrorText);
        return;
    }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox");
    if (success == false) {
        console.log(imap.LastErrorText);
        return;
    }

    // Find emails marked as seen or not already seen:
    var seenSearch = "SEEN";
    var notSeenSearch = "NOT SEEN";

    // Get the set of unseen message UIDs
    var fetchUids = true;
    var messageSet = new chilkat.MessageSet();
    success = imap.QueryMbx(notSeenSearch,fetchUids,messageSet);
    if (success == false) {
        console.log(imap.LastErrorText);
        return;
    }

    // Fetch the unseen emails into a bundle object:
    var bundle = new chilkat.EmailBundle();
    var headersOnly = false;
    success = imap.FetchMsgSet(headersOnly,messageSet,bundle);
    if (success == false) {
        console.log(imap.LastErrorText);
        return;
    }

    // Display the Subject and From of each email.
    var email = new chilkat.Email();
    var i = 0;
    var numEmails = bundle.MessageCount;
    while (i < numEmails) {
        bundle.EmailAt(i,email);

        console.log(email.GetHeaderField("Date"));
        console.log(email.Subject);
        console.log(email.From);
        console.log("--");
        i = i+1;
    }

    // Disconnect from the IMAP server.
    success = imap.Disconnect();

}

chilkatExample();