Question

public class ConnectGmail {

  public static void main(String args[]) throws Exception {


    PasswordAuthentication authentication;

    Properties props = System.getProperties();
    props.setProperty("mail.store.protocol", "imap");

    Session session = Session.getDefaultInstance(props);
    Store store = session.getStore("imap");

    try {

      store.connect(host , user , "password");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

Got this ERROR .. I almost tried with all the protocol

javax.mail.MessagingException: Connection refused: connect;
  nested exception is:
    java.net.ConnectException: Connection refused: connect
    at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:571)
    at javax.mail.Service.connect(Service.java:288)
    at javax.mail.Service.connect(Service.java:169)
    at ConnectGmail.main(ConnectGmail.java:26)

any help ??

Answer 1

You need to enable the mail authentification before you can use it:

Set property mail.smtp.auth to true to enalbe authentification.

If true, attempt to authenticate the user using the AUTH command. Defaults to false.

@see Javadoc of Package com.sun.mail.smtp