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java.lang.IllegalStateException: Folder is not Open	at com.sun.mail.pop3.POP3Folder.checkOpen(POP3Folder.java:385)	at com.sun.mail.pop3.POP3Folder.getProtocol(POP3Folder.java:412)	at com.sun.mail.pop3.POP3Message.getContentStream(POP3Message.java:116)	at javax.mail.internet.MimePartDataSource.getInputStream(MimePartDataSource.java:61)	at javax.activation.DataHandler.writeTo(DataHandler.java:297)	at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1089)	at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1527)	at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1503)	at com.sun.mail.handlers.message_rfc822.writeTo(message_rfc822.java:89)	at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:849)	at javax.activation.DataHandler.writeTo(DataHandler.java:305)	at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1089)	at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:635)	at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:233)	at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:68)	at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:849)	at javax.activation.DataHandler.writeTo(DataHandler.java:305)	at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1089)	at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1527)	at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:321)	at javax.mail.Transport.send0(Transport.java:164)	at javax.mail.Transport.send(Transport.java:81)	at alt.javax.mail.TransportImpl.send(TransportImpl.java:18)	at com.atlassian.mail.server.impl.SMTPMailServerImpl.send(SMTPMailServerImpl.java:138)	at com.atlassian.mail.queue.SingleMailQueueItem.send(SingleMailQueueItem.java:47)	at com.atlassian.mail.queue.MailQueueImpl.sendBuffer(MailQueueImpl.java:55)