Quarantine release and Dedpuplication

Shawn Iverson iversons at rushville.k12.in.us
Tue Nov 27 15:42:56 UTC 2018


Indeed, Exchange does not out of the box accept email that is re-sent with
the same message ID.

MailScanner, though, does not release quarantined messages, it just stores
them in quarantine based on your rules.  MailWatch is releasing the
messages, not MailScanner, and it is probably using the sendmail command to
do that, which means the message content is being released as-is.

You may want to reach out to the MailWatch team and see if they can assist
you.  In theory, it should be possible to modify the Message ID on the
fly.  I'm fairly certain that MailWatch is currently not doing that.

On Mon, Nov 26, 2018 at 8:57 PM George Papamichelakis <
gpapamichelakis at gmail.com> wrote:

> Hi all,
> I have this scenario and I wonder how do you people cope with it (if you
> do) :
> I have a postfix as a primary MX for a domain  with some system users and
> an exchange server behind with some additional users. Normally when I
> release a quarantined message (mostly due to filename restrictions) the
> exchange users did not receive this email with the released attachment but
> the postfix (linux) system users   did (exchange implements deduplication
> by default I guess). In the way I had to implement  on dovecot  a global
> sieve sieve filter which also adds deduplication . Now when I release a
> message no user gets the released message because it has the same ID as the
> one blocked in the first place. One way to address this is to modify the
> global sieve script to not discard the duplicate messages but to store them
> in a folder for the user to see , but this breaks the reason why the action
> was implemented in the first place.
> A second way to bypass this restriction is to release the message in an
> alternative user and then this user to FWD to the original recipients, but
> this is also awkward.
>  I wonder how likely it is to be able to modify the messageID of the
> released quarantined message in order to bypass this ?
> I use mailwatch to view and release quarantined messages.
> Thanks for any suggestions
> GP
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Shawn Iverson, CETL
Director of Technology
Rush County Schools
765-932-3901 option 7
iversons at rushville.k12.in.us
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