pop3 works, imap fails with No login methods supported!

[Pat Farrell]

I have code, mostly from the Sun java examples that connects to a mail server to fetch messages. Using the standard mail.jar and activation.jar from Sun.

When I specify "pop3" it works fine. But when i try imap, it fails. throwing a "No login methods supported!" message

public static class ImapAuth extends  Authenticator {
private final String username;
private final String password;
    public ImapAuth(String user, String pass) {
        username = user;
        password = pass;
    }
        @Override
    public PasswordAuthentication  getPasswordAuthentication() {
        PasswordAuthentication rval = new PasswordAuthentication(username, password);
        return rval;
    }
}

I am at a loss as to what is wrong. I would know how to proceed if it returned "can't login" or "bad password" or any other exception hinting that I'm passing in bad values, but no login method???

[Rob Spoor]

Is IMAP supported by the mail server?

[Paul Clapham]

The JavaMail FAQ suggests turning on debug mode for the mail session and examining the output for this kind of problem.

[Pat Farrell]

Rob Prime wrote:Is IMAP supported by the mail server?

Yes, ports opened in the firewalls, etc.

[Pat Farrell]

Paul Clapham wrote:The JavaMail FAQ suggests turning on debug mode for the mail session and examining the output for this kind of problem.

Log results:

12:01:30,667 DEBUG MailReader:157 - u:fnfbook p:seriouspassword
DEBUG: setDebug: JavaMail version 1.4ea
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc]
DEBUG: mail.imap.fetchsize: 16384
12:01:30,703 DEBUG MailReader:165 - is IMAPStore
DEBUG: protocolConnect returning false, host=quad.pfarrell.com, user=fnfbook, password=<null>
* OK [CAPABILITY IMAP4REV1 I18NLEVEL=1 LITERAL+ SASL-IR LOGIN-REFERRALS STARTTLS LOGINDISABLED] [172.16.4.5] IMAP4rev1 2007b.404 at Fri, 15 Jan 2010 12:01:30 -0500 (EST)
A0 CAPABILITY
* CAPABILITY IMAP4REV1 I18NLEVEL=1 LITERAL+ IDLE UIDPLUS NAMESPACE CHILDREN MAILBOX-REFERRALS BINARY UNSELECT ESEARCH WITHIN SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND SASL-IR LOGIN-REFERRALS STARTTLS LOGINDISABLED
A0 OK CAPABILITY completed
DEBUG: protocolConnect login, host=quad.pfarrell.com, user=fnfbook, password=<non-null>
12:01:35,748 FATAL MailReader:198 - messaging exception
javax.mail.MessagingException: No login methods supported!

Note: the first line is my debug line of the subclass extending Authenticator, verifying that there are non-null password, Yet the Javamail debug line shows: user=fnfbook, password=<null>