情況一：通過pop3獲取郵件

javax.mail.FolderNotFoundException: folder is not INBOX
	at com.sun.mail.pop3.POP3Folder.open(POP3Folder.java:205)
	at com.dascom.james.service.impl.MailServiceImpl.getFrom(MailServiceImpl.java:209)
	at com.dascom.james.controller.MailInfoController.receiveMail(MailInfoController.java:109)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498) 
	...
 

• 說明：通過檢視folder列表確實沒有找到Sent發件箱fullname；

• 檢視方式：Folder folder[ ]=store.getDefaultFolder().list();

• 解決辦法：可以換成使用IMAP獲取郵件

情況二：通過IMAP獲取郵件

javax.mail.FolderNotFoundException: Sent not found
	at com.sun.mail.imap.IMAPFolder.checkExists(IMAPFolder.java:383)
	at com.sun.mail.imap.IMAPFolder.open(IMAPFolder.java:934)
	at com.dascom.james.service.impl.MailServiceImpl.getFrom(MailServiceImpl.java:210)
	at com.dascom.james.controller.MailInfoController.receiveMail(MailInfoController.java:109)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	...
 

• 原因：使用者的發件箱為null；初始使用者只存在inbox收件箱，沒有發件箱、垃圾箱等，可以先發一封郵件試試