Emails with attachments stuck in POP box

When using the CreateOrCommentHandler to create issues from email in a POP box, it is possible for some emails to get 'stuck', so they create a new JIRA issue(s) every time the POPService runs.

This happens when a user's mail client (here, Lotus Notes) tries to encode the filename field of the Content-Disposition: header, as described at http://www.mhonarc.org/~ehood/MIME/2047/rfc2047.html. According to:

http://java.sun.com/products/javamail/FAQ.html#encodefilename

this is not MIME-compliant behaviour. The attachment is saved with the base64-encoded name ('=?UTF-8?B?U291bmR...'). JIRA may throw an exception [1] when trying to parse the header, and on Windows, will throw another exception[2] when trying to save the attachment with an undecoded filename.

A partial workaround has been implemented for 2.5. The filename is checked to see if it appears to be encoded (begins with '=?'), and if so, is decoded. This avoids the second exception, but not the first (which I cannot replicate).

[1]
2003-10-16 06:51:42,125 DEBUG [atlassian.jira.mail.MailQueueImpl] Queued:
+com.atlassian.jira.mail.IssueMailQueueItem@8ea21d[issue=org.ofbiz.core.entity.GenericValue@e6e42e[id=11392,summary=RE:
+Seeking a "Great" Marketing Partner?,key=CSS-56,created=2003-10-16 06:50:55.078,updated=2003-10-16
+06:50:55.078,assignee=<null>,reporter=externaluser],remoteUser=externaluser,notificationType=ISSUE_CREATED,template=issuecrea
+ted.vm,subjectPrefix=Created: ]^M
2003-10-16 06:51:42,140 DEBUG [service.util.handler.CreateIssueHandler] Issue CSS-56 created^M
2003-10-16 06:51:42,156 ERROR [service.util.handler.CreateIssueHandler] Could not create issue!^M
javax.mail.internet.ParseException^M
at javax.mail.internet.ParameterList.<init>(ParameterList.java:61)^M
at javax.mail.internet.ContentDisposition.<init>(ContentDisposition.java:70)^M
at javax.mail.internet.MimeBodyPart.getDisposition(MimeBodyPart.java:827)^M
at javax.mail.internet.MimeBodyPart.getDisposition(MimeBodyPart.java:241)^M
at
+com.atlassian.jira.service.util.handler.AbstractMessageHandler.createAttachmentsForMessage(AbstractMessageHandler.java:75)^M
at com.atlassian.jira.service.util.handler.CreateIssueHandler.handleMessage(CreateIssueHandler.java:122)^M
at com.atlassian.jira.service.util.handler.CreateOrCommentHandler.handleMessage(CreateOrCommentHandler.java:112)^M
at com.atlassian.jira.service.services.pop.PopService.run(PopService.java:97)^M
at com.atlassian.jira.service.JiraServiceContainer.run(JiraServiceContainer.java:54)^M
at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:53)^M
at org.quartz.core.JobRunShell.run(JobRunShell.java:147)^M
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:387)^M

[2]
2003-10-16 06:53:28,093 ERROR [service.util.handler.AbstractMessageHandler] Exception while creating attachment^M
java.io.IOException: Could not move (or copy) attachment from d:\Jira\Attachments\CSS\CSS-57\tempattach22747dat to
+d:\Jira\Attachments\CSS\CSS-57\10130_=?UTF-8?B?U291bmRXYXZlIGFuZCBOdWNsZXVzIFIxMjYgU2lkZS1ieS1TaWRlIEluc3RhbGxhdGlvbi5kb2M=?=
+:java.io.FileNotFoundException:
+d:\Jira\Attachments\CSS\CSS-57\10130_=?UTF-8?B?U291bmRXYXZlIGFuZCBOdWNsZXVzIFIxMjYgU2lkZS1ieS1TaWRlIEluc3RhbGxhdGlvbi5kb2M=?=
+(The filename, directory name, or volume label syntax is incorrect)^M