Duplicate issues created by mail handler when the email is not processed correctly

2012-08-02 14:00:01,487 QuartzWorker-1 INFO ServiceRunner    Mails an diagnostic-request@example.co.uk[atlassian.mail.incoming.mailfetcherservice] Mails an diagnostic-request@example.co.uk[10200]: Issue DIAREQ-13 created
2012-08-02 14:00:01,490 QuartzWorker-1 WARN ServiceRunner    Mails an diagnostic-request@example.co.uk [atlassian.mail.incoming.mailfetcherservice] Mails an diagnostic-request@example.co.uk[10200]: Unable to create issue with message.
javax.mail.internet.AddressException: Domain contains control or whitespace in string ``jira.admin@example co.uk''
	at javax.mail.internet.InternetAddress.checkAddress(InternetAddress.java:1253)
	at javax.mail.internet.InternetAddress.parse(InternetAddress.java:965)
	at javax.mail.internet.InternetAddress.parseHeader(InternetAddress.java:658)
	at javax.mail.internet.MimeMessage.getAddressHeader(MimeMessage.java:702)
	at javax.mail.internet.MimeMessage.getRecipients(MimeMessage.java:534)
	at javax.mail.Message.getAllRecipients(Message.java:305)
	at javax.mail.internet.MimeMessage.getAllRecipients(MimeMessage.java:549)
	at com.atlassian.jira.plugins.mail.handlers.CreateIssueHandler.addCcWatchersToIssue(CreateIssueHandler.java:313)
	at com.atlassian.jira.plugins.mail.handlers.CreateIssueHandler.handleMessage(CreateIssueHandler.java:249)
	at com.atlassian.jira.plugins.mail.handlers.CreateOrCommentHandler.handleMessage(CreateOrCommentHandler.java:133)
...
2012-08-02 14:02:01,329 QuartzWorker-1 INFO ServiceRunner    Mails an diagnostic-request@example.co.uk [atlassian.mail.incoming.mailfetcherservice] Mails an diagnostic-request@example.co.uk[10200]: Issue DIAREQ-14 created
2012-08-02 14:02:01,330 QuartzWorker-1 WARN ServiceRunner    Mails an diagnostic-request@example.co.uk [atlassian.mail.incoming.mailfetcherservice] Mails an diagnostic-request@example.co.uk[10200]: Unable to create issue with message.
javax.mail.internet.AddressException: Domain contains control or whitespace in string ``jira.admin@example co.uk''
	at javax.mail.internet.InternetAddress.checkAddress(InternetAddress.java:1253)
	at javax.mail.internet.InternetAddress.parse(InternetAddress.java:965)
	at javax.mail.internet.InternetAddress.parseHeader(InternetAddress.java:658)
	at javax.mail.internet.MimeMessage.getAddressHeader(MimeMessage.java:702)
	at javax.mail.internet.MimeMessage.getRecipients(MimeMessage.java:534)
	at javax.mail.Message.getAllRecipients(Message.java:305)
	at javax.mail.internet.MimeMessage.getAllRecipients(MimeMessage.java:549)
	at com.atlassian.jira.plugins.mail.handlers.CreateIssueHandler.addCcWatchersToIssue(CreateIssueHandler.java:313)
	at com.atlassian.jira.plugins.mail.handlers.CreateIssueHandler.handleMessage(CreateIssueHandler.java:249)

2012-09-19 14:35:46,258 ERROR [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP Problem reading attachment from email for issue CSP-959
com.sun.mail.util.FolderClosedIOException
	at com.sun.mail.imap.IMAPInputStream.forceCheckExpunged(IMAPInputStream.java:100)
	at com.sun.mail.imap.IMAPInputStream.fill(IMAPInputStream.java:150)
	at com.sun.mail.imap.IMAPInputStream.read(IMAPInputStream.java:208)
...

2012-09-19 14:35:46,293 DEBUG [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP part=com.sun.mail.imap.IMAPBodyPart@a49a03
2012-09-19 14:35:46,295 DEBUG [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP Filename=example file, content type=message/rfc822, content=com.sun.mail.imap.IMAPNestedMessage@1610d1f
2012-09-19 14:35:46,304 INFO [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP CSP[10200]: Added attachment to issue 'CSP-959'
2012-09-19 14:35:46,307 DEBUG [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP Created attachment null for issue CSP-959
2012-09-19 14:35:46,310 DEBUG [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP Deleting Message: <0381CA4265117445BAD6757C1FCCA514ADA247@example.com>
2012-09-19 14:35:46,314 ERROR [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP CSP[10200]: Messaging Exception in service 'com.atlassian.jira.service.services.mail.MailFetcherService$MessageProviderImpl' when getting mail: null
javax.mail.FolderClosedException

...
2012-09-19 14:35:46,333 DEBUG [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP Closing folder
2012-09-19 14:35:46,334 DEBUG [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP Closing store
2012-09-19 14:35:46,336 DEBUG [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP DEBUG: IMAPStore cleanup, force false
2012-09-19 14:35:46,337 DEBUG [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP DEBUG: IMAPStore cleanup done
2012-09-19 14:35:46,339 DEBUG [application.imap.example.com] QuartzWorker-0 ServiceRunner    CSP DEBUG: IMAPStore cleanup, not connected