Can't disable plain login on imap

Question

I'm trying to write a program that retrieves mail from an imap server. The user name and password won't validate. If I try to connect via pop3 it connects. The mail adminstrator says that I should be able to connect via imap and I am able to using Eudora. The mail adminstrator says we use a cleartext login. I am unable to force imap to use the login method. I have the following line in my properties file to disable Authentication plain.
          prop.put("mail.imap.auth.plain.disable",true);
But it still tries to Authenticate plain. Can somebody tell me what I am doing wrong? Here is my code along with the stack trace.
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
public class ImapRead
     Properties prop = null;
     public ImapRead()
          prop = new Properties();
          prop.put("server", "mail.company.com");
          prop.put("mail.imap.host", "mail.company.com");
          prop.put("mail.imap.auth.plain.disable",true);
     public void imapRun()
          String host = prop.getProperty("server");
          String username = prop.getProperty("username");
          String password = prop.getProperty("password");
          try {
               Authenticator auth = new MailAuthenticator();
               Session session = Session.getInstance(prop,auth);
               session.setDebug(true);
               Store store = session.getStore("imap");
               store.connect(host,username,password);
               store.close();
          } catch (Exception ex) {
               ex.printStackTrace();
               System.exit(0);
     public static void main(String[] args)
          ImapRead mread = new ImapRead();
          mread.imapRun();
Authenticator class
mport javax.mail.*;
import java.util.*;
public class MailAuthenticator extends Authenticator
     public PasswordAuthentication getPasswordAuthentication()
          String username = "[email protected]";
          String password = "password";
          return new PasswordAuthentication(username,password);
DEBUG: setDebug: JavaMail version 1.4
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc]
DEBUG: mail.imap.fetchsize: 16384
* OK IMAP4 Server (IMail 8.22)
A0 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 UIDPLUS AUTH=CRAM-MD5 AUTH=PLAIN AUTH=LOGIN
A0 OK CAPABILITY completed
IMAP DEBUG: AUTH: CRAM-MD5
IMAP DEBUG: AUTH: PLAIN
IMAP DEBUG: AUTH: LOGIN
DEBUG: protocolConnect login, host=mail.ikano.com, user=rlawtest, password=<non-null>
A1 AUTHENTICATE PLAIN
+
cmxhd3Rlc3QAcmxhd3Rlc3QAcmxAdzczNTc=
A1 NO AUTHENTICATE Invalid userid/password
* OK IMAP4 Server (IMail 8.22)
A0 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 UIDPLUS AUTH=CRAM-MD5 AUTH=PLAIN AUTH=LOGIN
A0 OK CAPABILITY completed
IMAP DEBUG: AUTH: CRAM-MD5
IMAP DEBUG: AUTH: PLAIN
IMAP DEBUG: AUTH: LOGIN
DEBUG: protocolConnect login, host=mail.ikano.com, [email protected], password=<non-null>
A1 AUTHENTICATE PLAIN
+
cmxhd3Rlc3RAbWFpbC5pa2Fuby5jb20Acmxhd3Rlc3RAbWFpbC5pa2Fuby5jb20AcmxAdzczNTc=
A1 NO AUTHENTICATE Invalid userid/password
javax.mail.AuthenticationFailedException: AUTHENTICATE Invalid userid/password
     at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:474)
     at javax.mail.Service.connect(Service.java:297)
     at javax.mail.Service.connect(Service.java:156)
     at com.ikano.mail.ImapRead.imapRun(ImapRead.java:37)
     at com.ikano.mail.ImapRead.main(ImapRead.java:61)

Answer 1

Hi,
I am trying experiencing a similar issue with IMAP and trying hard to disable AUTH: PLAIN.
I set the property as follows with "xxxxxxxx...." shown below with right values:
props.setProperty("mail.store.protocol","imaps");
     props.setProperty("mail.imap.auth.plain.disable","true"); -- "true" within quotes as yu see
     props.setProperty("mail.imap.host","xxxxxxxxxxx");
     props.setProperty("mail.imap.port","993");
     props.setProperty("mail.imap.user","xxxxxxx");
     props.setProperty("mail.imap.pwd","xxxxxx");
     props.setProperty("mail.imap.debug","true");
Still i couldn't get AUTH:PLAIN disabled and trying to get AUTH:NTLM enabled.
DEBUG: setDebug: JavaMail version 1.4.1
DEBUG: getProvider() returning javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc]
DEBUG: mail.imap.fetchsize: 16384
* OK Microsoft Exchange Server 2007 IMAP4 service ready
A0 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 AUTH=NTLM AUTH=GSSAPI AUTH=PLAIN IDLE NAMESPACE LITERAL+
A0 OK CAPABILITY completed.
IMAP DEBUG: AUTH: NTLM
IMAP DEBUG: AUTH: GSSAPI
IMAP DEBUG: AUTH: PLAIN
DEBUG: protocolConnect login, host=xxxxxxxxxxx, user=xxxxxxx, password=<non-null>
A1 AUTHENTICATE PLAIN
+
NzM0NjE1NTk5NAA3MzQ2MTU1OTk0AE5ld3Bhc3N3MHJk
A1 NO AUTHENTICATE failed.
caught exception: javax.mail.AuthenticationFailedException: AUTHENTICATE failed.
javax.mail.AuthenticationFailedException: AUTHENTICATE failed.
     at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:566)
     at javax.mail.Service.connect(Service.java:288)
     at javax.mail.Service.connect(Service.java:169)
     at edu.umich.mais.mail.testssl.main(testssl.java:59)
Please help!!! thanks in advance.