Java从Proxy伺服器背后的gmail读取电子邮件

Question

我正在开发一个程序，该程序在具有代理系统来监视用户活动的组织中从gmail读取电子邮件。 我尝试过使用所有可能的解决方案，但似乎都没有用。 任何帮助将不胜感激。谢谢您的帮助。

代码：

 public MailReader()
 {
 /*  Set the mail properties  */
 Properties props = System.getProperties();
 props.setProperty("mail.store.protocol", "imaps");
 try
 {
 /*  Create the session and get the store for read the mail. */
 Session session = Session.getDefaultInstance(props, null);
 Store store = session.getStore("imaps");
 store.connect("imap.gmail.com","<EMAIL>", "<PASS>");

 /*  Mention the folder name which you want to read. */
 inbox = store.getFolder("Inbox");
 System.out.println("No of Unread Messages : " + inbox.getUnreadMessageCount());

 /*Open the inbox using store.*/
 inbox.open(Folder.READ_ONLY);

 /*  Get the messages which is unread in the Inbox*/
 Message messages[] = inbox.search(new FlagTerm(new Flags(Flag.SEEN), false));

 /* Use a suitable FetchProfile    */
 FetchProfile fp = new FetchProfile();
 fp.add(FetchProfile.Item.ENVELOPE);
 fp.add(FetchProfile.Item.CONTENT_INFO);
 inbox.fetch(messages, fp);

 try
 {
 printAllMessages(messages);
 inbox.close(true);
 store.close();
 }
 catch (Exception ex)
 {
 System.out.println("Exception arise at the time of read mail");
 ex.printStackTrace();
 }
 }
 catch (NoSuchProviderException e)
 {
 e.printStackTrace();
 System.exit(1);
 }
 catch (MessagingException e)
 {
 e.printStackTrace();
 System.exit(2);
 }
 }

流动是我得到的错误代码。 java.net.UnknownHostException

    javax.mail.MessagingException: imap.gmail.com;
  nested exception is:
    java.net.UnknownHostException: imap.gmail.com
    at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:665)
    at javax.mail.Service.connect(Service.java:295)
    at javax.mail.Service.connect(Service.java:176)
    at javaapplication1.MailReader.<init>(MailReader.java:29)
    at javaapplication1.MailReader.main(MailReader.java:149)
Caused by: java.net.UnknownHostException: imap.gmail.com
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:668)
    at sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:173)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:288)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:231)
    at com.sun.mail.iap.Protocol.<init>(Protocol.java:113)
    at com.sun.mail.imap.protocol.IMAPProtocol.<init>(IMAPProtocol.java:110)
    at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:632)
    ... 4 more

Answer 1

甲骨文在这里说：

JavaMail当前不支持通过Web代理服务器访问邮件服务器。
...
如果您的代理服务器支持SOCKS V4或V5协议（ http://www.socks.nec.com/aboutsocks.html，RFC1928 ）并允许匿名连接，并且您使用的是JDK 1.5或更高版本以及JavaMail 1.4.5或较新的版本，您可以按照com.sun.mail.smtp软件包的javadocs中的说明设置“ mail.smtp.socks.host”属性，以每个会话，每个协议为基础配置SOCKS代理。 对于“ imap”和“ pop3”协议，存在类似的属性。