Use Javamail for accessing Microsoft Exchange mailboxes (IMAP, MS Exchange)

Question

I need to connect to a Microsoft Exchange Server through IMAPS JavaMail. First, I got the:

A1 NO AUTHENTICATE failed.
javax.mail.AuthenticationFailedExcepti         


        

Answer 1

You need to use a newer version of JavaMail that supports NTLM authentication. The latest version is 1.5.1.

Also, see this list of common mistakes.

Answer 2

It will workout if the username and the mail id both are same.

For example: system username is john and mail id john@test.com

IMAP is try to login the mail id using the username "john" from john@test.com, if the user id is differ it will not login.

Answer 3

Try using your own Authenticator

public class ExchangeAuthenticator extends Authenticator {

    String username;
    String password;

    public ExchangeAuthenticator(String username, String password) {
        super();
        this.username= username;
        this.password= password;
    }

    public PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(username, password);
    }
}

and in your code add

session = Session.getInstance(props,new ExchangeAuthenticator(username, password));