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https://issues.apache.org/jira/browse/IMAP-249?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wojtek Strzalka updated IMAP-249:
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Attachment: empty_request.pcap
sample record from session with Outlook 2007 - it's multi threaded but you can
see there broken request and the following BYE response
> IMAP should not disconnect clients on bad command immediatelly
> --------------------------------------------------------------
>
> Key: IMAP-249
> URL: https://issues.apache.org/jira/browse/IMAP-249
> Project: JAMES Imap
> Issue Type: Bug
> Components: Parser
> Affects Versions: 0.2-M1
> Reporter: Wojtek Strzalka
> Fix For: 0.2
>
> Attachments: empty_request.pcap
>
>
> When IMAP processor can not parse command immediately disconnects a client .
> Unfortunately from time to time outlook sends bad commands to the server.
> One of the examples is Outlook 2007 - when copying a message (drag & drop
> message with Ctrl) it sends an empty request to the server ( \r \n ).
> There are 2 options I can think about:
> a) handling only the case would require consuming '\r' '\n' characters before
> processing a tag
> b) general change of error handling - here is what Courier-IMAP is doing:
> instead of sending bye & disconnecting, we could send NO, to avoid DoS
> 10 consequent errors are allowed, then say bye
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