Java

SMTP GMail Send using App Password

See more GMail SMTP/IMAP/POP Examples

Demonstrates how to authenticate using an app password with GMail for SMTP (port 465 using implicit SSL/TLS). Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.MailMan;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // Starting May 30, 2022, Google will no longer support the use of third-party apps or devices
        // which ask you to sign in to your Google Account using only your username and password.

        // Instead of authenticating with your GMail username/password, a GMail user can create an App Password
        // and then login using their username/app_password.   It's literally the same, except it allows a GMail
        // account owner to isolate passwords to specific applications.

        // The Gmail account owner would first need to make sure she has 2-Step Verification setup for her account.
        // Note: The 2FA verification is not a factor when authenticating with an app password. The 2FA is required
        // to setup app passwords in the Google account console.  See Sign in with App Passwords

        // After the GMail account owner has setup his app password, he simply uses the app password instead of his GMail account password.

        MailMan mailman = new MailMan();

        mailman.setSmtpHost("smtp.gmail.com");

        mailman.setSmtpUsername("user@gmail.com");
        mailman.setSmtpPassword("srnyyvqajocnsvdp");

        mailman.setSmtpSsl(true);
        mailman.setSmtpPort(465);

        try {
            mailman.smtpConnect();

            mailman.smtpAuthenticate();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("SMTP Success!");
    }
}