POP invalid email forwarding does not work

Tried to forward invalid emails (usually spam) to myself:

2005-05-12 01:42:19,963 DEBUG [service.services.mail.MailFetcherService] There are 2 messages in the pop folder
2005-05-12 01:42:20,004 DEBUG [service.services.mail.MailFetcherService] Message Subject: enlarge girth and length
2005-05-12 01:42:20,004 DEBUG [atlassian.jira.mail.MailThreadManagerImpl] Cannot determine message id of the e-mail message.
2005-05-12 01:42:20,031 DEBUG [service.services.mail.MailFetcherService] Forwarding Message: com.sun.mail.pop3.POP3Message@cb353b
2005-05-12 01:42:20,131 INFO [velocity] ResourceManager : found templates/email/text/errorinhandler.vm with loader org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
2005-05-12 01:42:20,181 DEBUG [atlassian.mail.queue.MailQueueImpl] Queued: To='jeff@atlassian.com' Subject='Error in: enlarge girth and length' From='null' FromName='null' Cc='null' Bcc='null' ReplyTo='null' InReplyTo='null' MimeType='text/plain' Encoding='UTF-8' Multipart='javax.mail.internet.MimeMultipart@17b1871' MessageId='null'
2005-05-12 01:42:20,221 DEBUG [service.services.mail.MailFetcherService] Message Subject: Returned mail: see transcript for details
2005-05-12 01:42:20,222 DEBUG [atlassian.jira.mail.MailThreadManagerImpl] Cannot determine message id of the e-mail message.
2005-05-12 01:42:20,248 DEBUG [service.services.mail.MailFetcherService] Forwarding Message: com.sun.mail.pop3.POP3Message@81ca74
2005-05-12 01:42:20,329 DEBUG [atlassian.mail.queue.MailQueueImpl] Queued: To='jeff@atlassian.com' Subject='Error in: Returned mail: see transcript for details' From='null' FromName='null' Cc='null' Bcc='null' ReplyTo='null' InReplyTo='null' MimeType='text/plain' Encoding='UTF-8' Multipart='javax.mail.internet.MimeMultipart@11624bb' MessageId='null'
2005-05-12 01:42:20,368 DEBUG [atlassian.jira.service.ServiceRunner] Finished Running Service [Container: com.atlassian.jira.service.services.pop.PopService null delay [60000ms]]

However when the generated mail is actually flushed from the queue, we get this error:

2005-05-12 01:43:05,308 DEBUG [atlassian.mail.queue.MailQueueImpl] Sending: To='jeff@atlassian.com' Subject='Error in: enlarge girth and length' From='null' FromName='null' Cc='null' Bcc='null' ReplyTo='null' InReplyTo='null' MimeType='text/plain' Encoding='UTF-8' Multipart='javax.mail.internet.MimeMultipart@17b1871' MessageId='null'
2005-05-12 01:43:05,392 INFO [org.quartz.core.JobRunShell] Job DEFAULT.ServicesJob threw a JobExecutionException:
org.quartz.JobExecutionException: java.lang.IllegalStateException: Folder is not Open [See nested exception: java.lang.IllegalStateException: Folder is not Open]
at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:54)
at org.quartz.core.JobRunShell.run(JobRunShell.java:191)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:516)

• Nested Exception (Underlying Cause) ---------------
  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)
  at com.atlassian.jira.service.services.mail.MailQueueService.run(MailQueueService.java:23) at com.atlassian.jira.service.JiraServiceContainer.run(JiraServiceContainer.java:59)
  at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:50) at org.quartz.core.JobRunShell.run(JobRunShell.java:191) at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:516)2005-05-12 01:43:05,394 DEBUG [atlassian.jira.service.ServiceRunner] ServiceRunner.runServices() Running at [2005-05-12 01:43:05,394]

The spam mails are not deleted from the POP box, and neither do I get the mail forwarded to me. The mail appears in the queue, marked as 'error', and flushing the queue results in above stacktrace. I suspect the mail wasn't sent because the From address isn't set.