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”的解决办法

2012-12-19

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.ne

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

view plaincopy to clipboardprint?

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

view plaincopy to clipboardprint?

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

view plaincopy to clipboardprint?

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;?

热点排行

Bad Request.

网络基础

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”的解决办法