Java Mail api，成功复制邮件，但已从exchange server中删除电子邮件

使用java邮件api，我们可以监视收件箱文件夹中的邮件并处理电子邮件。如果在处理电子邮件时发生错误，我们会将其移动到错误文件夹

如果成功，我们将从收件箱文件夹中删除电子邮件。下面是邮件调试的一个片段。它显示复制成功，但在错误目录中找不到该电子邮件，并且该电子邮件也已从收件箱中删除

为什么会发生这种情况？还有，为什么即使邮件未被复制，java mail api也会报告成功

2013-10-04 14:25:20,886 [] [] [] INFO  [monitorScheduler-1] monitor.EmailMonitor monitor.EmailMonitor (EmailMonitor.java:393) - Copy error message to error folder
2013-10-04 14:25:20,889 [] [] [] INFO  [monitorScheduler-1] STDOUT util.LoggerStream (LoggerStream.java:156) - A10 COPY 1 Inbox/error
2013-10-04 14:25:20,896 [] [] [] INFO  [monitorScheduler-1] STDOUT util.LoggerStream (LoggerStream.java:156) - A10 OK COPY completed.
2013-10-04 14:25:20,897 [] [] [] INFO  [monitorScheduler-1] monitor.EmailMonitor monitor.EmailMonitor (EmailMonitor.java:400) - Mark message as deleted from monitored folder
2013-10-04 14:25:20,897 [] [] [] INFO  [monitorScheduler-1] STDOUT util.LoggerStream (LoggerStream.java:156) - A11 STORE 1 +FLAGS (\Deleted)
2013-10-04 14:25:20,907 [] [] [] INFO  [monitorScheduler-1] STDOUT util.LoggerStream (LoggerStream.java:156) - * 1 FETCH (FLAGS (\Seen \Deleted \Recent))
A11 OK STORE completed.
2013-10-04 14:25:20,907 [] [] [] INFO  [monitorScheduler-1] monitor.EmailMonitor monitor.EmailMonitor (EmailMonitor.java:404) - Expunge the monitored folder
2013-10-04 14:25:20,908 [] [] [] INFO  [monitorScheduler-1] STDOUT util.LoggerStream (LoggerStream.java:156) - A12 EXPUNGE
2013-10-04 14:25:20,922 [] [] [] INFO  [monitorScheduler-1] STDOUT util.LoggerStream (LoggerStream.java:156) - * 1 EXPUNGE
* 0 EXISTS
A12 OK EXPUNGE completed.

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报告成功的是您的服务器

请尝试为错误文件夹使用其他名称，而不是“收件箱”下的名称，以防有所帮助