[Mimedefang] resending mails from quarantine, modify Message-ID or use Resent-Headers?

[Marcus Schopen]

Am Dienstag, den 03.01.2017, 19:58 +0100 schrieb Peter Bonivart:
> On Tue, Jan 3, 2017 at 7:19 PM, Marcus Schopen <lists at localguru.de> wrote:
> > Hi,
> >
> > I'm playing around with resending quarantined emails, if the user wants
> > them to be delivered and check locally. I set Resent-Headers in those
> > resent messages, so that cyrus delivers and doesn't drop them as
> > duplicates. Some users users pop their mailboxes with exchange or
> > popcon. Any experiences out there, if those messages get dropped by pop
> > clients because of the same Message-ID or should I better change the
> > original Message-ID header to something like X-Orig-Message-ID and set a
> > new Message-ID header?
> 
> Exchange has had a duplicate message protection looking at the message
> ID for a long time. I generate a new message ID to avoid that.

Thanks Peter!

I will set a new Message-ID too then. Do remove the old Message-ID
header or do you change it to X-Orig-Message-ID to keep it? 

And do you set Resent-Date, Resent-From, Resent-To, Resent-Message-ID
headers too?

Ciao
Marcus

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