On 5 Jun 2018, at 02:22, Matus UHLAR - fantomas <uh...@fantomas.sk> wrote: > in postyfix queue each mail does have its unique ID. However, when pushed > through any kind of content filter, the ID changes. > Also, when mail gets forwarded, the ID changes.
A new ID will be ADDED, but the original one remains in the headers, at least for filters. Received: by mail.covisp.net (Postfix, from userid 58) id 410Ptl2kC1zbRcb; Tue, 5 Jun 2018 02:22:39 -0600 (MDT) Received: from russian-caravan.cloud9.net (russian-caravan.cloud9.net [168.100.1.4]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.covisp.net (Postfix) with ESMTPS id 410Ptj3CtMzbRbb for <krem...@kreme.com>; Tue, 5 Jun 2018 02:22:37 -0600 (MDT) The top header is after spamd with a new ID and the bottom shows the initial ID after it was received by my mail server. It's not an issue to get the 'right' ID from the header, depending on which ID you consider the right one. -- The hippo of recollection stirred in the muddy waters of the mind.