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我在工作区访问 gmail 时遇到问题。这是我的代码。当网络设置为默认设置时，它在我家中工作。主要问题是，在工作区，计算机和网络（如防火墙等）的安全性更高。

我必须找到在防火墙后面运行此脚本的解决方案。关闭防火墙不是永久的解决方案。

我还在下面添加了错误消息。任何帮助表示赞赏。

  `com.sun.mail.util.MailConnectException: Couldn't connect to host, port: imap.gmail.com, 993; timeout -1;
  nested exception is:
    java.net.ConnectException: Connection timed out: connect
    at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:672)
    at javax.mail.Service.connect(Service.java:345)
    at javax.mail.Service.connect(Service.java:226)
    at unreadmails.MailReader.<init>(MailReader.java:23)
    at unreadmails.MailReader.main(MailReader.java:12)
Caused by: java.net.ConnectException: Connection timed out: connect
    at java.net.TwoStacksPlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:297)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:229)
    at com.sun.mail.iap.Protocol.<init>(Protocol.java:116)
    at com.sun.mail.imap.protocol.IMAPProtocol.<init>(IMAPProtocol.java:115)
    at com.sun.mail.imap.IMAPStore.newIMAPProtocol(IMAPStore.java:689)
    at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:638)
    ... 4 more`
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