用JavaMail通过转：MAP协议接收qq邮箱时出现“A0 BAD 命令无效或者不支持”的解决方法

转：http://blog.csdn.net/snowclash/archive/2011/01/24/6160999.aspx

 

最开始的java代码如下

 

import java.io.UnsupportedEncodingException;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Folder;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Store;
import ce.mail.models.ConnectionProfile;
public class ImapProtocolImpl extends Authenticator implements Protocol
{
    private Session session;
    private PasswordAuthentication authentication;

    public ImapProtocolImpl(ConnectionProfile profile, String username, String password)
    {
        Properties props = new Properties();
        props.setProperty("mail.store.protocol", profile.getProtocol());
        props.setProperty("mail.imap.host", profile.getFetchServer());
        props.setProperty("mail.imap.port", profile.getFetchPort());

        authentication = new PasswordAuthentication(username, password);
        session = Session.getInstance(props, this);
    }

    @Override
    public PasswordAuthentication getPasswordAuthentication()
    {
        return this.authentication;
    }

    public void connect()
    {
        try
        {
            Store store = session.getStore();
            store.connect();
            Folder root = store.getDefaultFolder();
            Folder inbox = root.getFolder("inbox");
            inbox.open(Folder.READ_WRITE);
            System.out.println(inbox.getMessageCount());
        }
        catch (MessagingException e)
        {
            try
            {
                byte[] buf = e.getMessage().getBytes("ISO-8859-1");
                System.out.println(new String(buf, "GBK"));
            }
            catch (UnsupportedEncodingException e1)
            {
                e1.printStackTrace();
            }
            throw new RuntimeException("登录失败", e);
        }
    }
}

 

该程序连接163邮箱时是正常的，但连接qq邮箱时会出错。

调用session.setDebug(true);后发现连qq邮箱的debug信息如下

 

DEBUG: setDebug: JavaMail version 1.4.3
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc]
DEBUG: mail.imap.fetchsize: 16384
DEBUG: mail.imap.statuscachetimeout: 1000
DEBUG: mail.imap.appendbuffersize: -1
DEBUG: mail.imap.minidletime: 10
DEBUG: trying to connect to host "imap.qq.com", port 143, isSSL false
* OK [CAPABILITY IMAP4 IMAP4rev1 AUTH=LOGIN NAMESPACE] QQMail IMAP4Server ready
IMAP DEBUG: AUTH: LOGIN
DEBUG: protocolConnect login, host=imap.qq.com, user=<qq号码>, password=<non-null>
A0 AUTHENTICATE LOGIN
A0 BAD ������Ч���߲�֧��
A0 BAD 命令无效或者不支持

 

上Google搜“java mail imap qq 邮箱”，发现《JavaMail中接收邮件的问题 》里提到，需要设置mail.imap.auth.plain.disable为true，但设置完后仍会出错。

继续搜mail.imap.auth.plain.disable，在api文档 中发现另外一个属性mail.imap.auth.login.disable，文档中提到“If true, prevents use of the non-standard AUTHENTICATE LOGIN command, instead using the plain LOGIN command. Default is false.”，而根据debug信息，连接qq邮箱也是在A0 AUTHENTICATE LOGIN之后提示错误，所以明显是这个参数的问题。

设置参数mail.imap.auth.login.disable为true后连接qq邮箱正常，最终程序如下

 

import java.io.UnsupportedEncodingException;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Folder;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Store;
import ce.mail.models.ConnectionProfile; 

  


  
    
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      2011-04-15 01:46
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