Exchange and duplicate message-id with quarantine.

[Peter Bonivart]

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Julian Field wrote:
> Hirsh, Joshua wrote:
>> I run into the same problem here. The default timeout in Exchange is one
>> hour, after which, the server will gladly accept and deliver the
>> messages.
>>
>> Julian: The problem is with an email that has an attachment removed or
>> blocked. The cleaned messages is sent on to the user and if you were to
>> release the blocked content (stored as a raw queue file) within an
>> hour of
>> originally receiving the message, Exchange silently blocks it out as
>> being a
>> duplicate.
>>
>>
> Okay, I see the problem now. However I don't really want to change the
> message-id of the cleaned message as I try to play with them as little
> as possible, and also if I do that then the message-id format won't
> match with the MUA that claimed to generate the message, which means it
> will get caught as spam by SpamAssassin which checks these things.
>
> So the only real solution is to change the message-id of the quarantined
> message as you send it. But I understand that is also hard if you are
> storing it as raw queue files.
>
> Got any ideas on potential solutions to this? I can't see any solution
> that wouldn't potentially break things further down stream, or make it
> very awkward to track mail using the Message-Id header, which is A Bad
> Thing(tm).

I have the same problem, when someone is quick to report that they want
a message released from quarantine it will just get eaten by Exchange as
some sort of protection against duplicate msgids. It doesn't seem to be
a way to turn this feature off, you can only set it to remember msgids
for a longer period, one hour is the minimum.

http://blogs.msdn.com/exchange/archive/2004/07/14/183132.aspx

--
/Peter Bonivart

--Unix lovers do it in the Sun

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