Exchange and duplicate message-id with quarantine.

[Julian Field]

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Peter Bonivart wrote:

> 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

What happens if you set
Remove These Headers = Message-Id
Then the Message-Id will be removed from the cleaned messages, forcing
Exchange it add its own, unique, id.

--
Julian Field
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