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Editorial Team
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Asked: 2026-06-09T21:15:26+00:00

I am trying out an email app on android.I take the username and password

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I am trying out an email app on android.I take the username and password first
then on the next activity i take the recipiend address subject and msg and send the email.
I get the error JavaX authentication failure.Here is my Mail authentication and sending code.OnClick function of the send button calls this class

public class MailHandler {
final String username;
final String password;
public MailHandler(String username,String password){
    this.username=username;
    this.password=password;

}

public void sendMail(String Sub,String msg,String sender,String cc,String to) {
    Properties props = new Properties();
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable", "true");
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.port", "587");

    Session session = Session.getInstance(props,
      new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(username, password);
        }
      });

    try {

        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress(sender));
        message.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse(to));
        message.setSubject(Sub);
        message.setText(msg);

        Transport.send(message);

        System.out.println("Done");

    } catch (MessagingException e) {
        throw new RuntimeException(e);
    }
}
}
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1 Answer

  1. Editorial Team

    Your code works. I copied it compiled and ran it using my gmail credentials. Are you sure you are using the correct gmail credentials for sending mail?

    MailHandler m = new MailHandler("myAccount@gmail.com", "myPassword");
m.sendMail("Test", "Testing", "myOtherAccount@gmail.com", "myWork@myCompany.com", "myOtherWork@myCompany.com");

    // After running I checked my work email and saw the message.

    If I use an invalid password I get the following statcktrace. Is this what you are seeing

    535 5.7.1 http://support.google.com/mail/bin/answer.py?answer=14257 jl8sm4152932obb.18

    at MailHandler.sendMail(MailHandler.java:50)
        at MailHandler.main(MailHandler.java:56)
Caused by: javax.mail.AuthenticationFailedException: 535-5.7.1 Username and Password not accepted. Learn more at
535 5.7.1 http://support.google.com/mail/bin/answer.py?answer=14257 jl8sm4151848obb.18
    at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:823)
    at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:756)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:673)
    at javax.mail.Service.connect(Service.java:317)
    at javax.mail.Service.connect(Service.java:176)
    at javax.mail.Service.connect(Service.java:125)
    at javax.mail.Transport.send0(Transport.java:194)
    at javax.mail.Transport.send(Transport.java:124)
    at MailHandler.sendMail(MailHandler.java:45)
    ... 1 more
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