On 25.6.2013, at 16.52, Reindl Harald <h.rei...@thelounge.net> wrote:
> Am 25.06.2013 15:28, schrieb Timo Sirainen: >> Also there are several potential problems.. Like if there are duplicate >> Message-ID: headers, >> but the body is different, should that be a duplicate? > > the answer is simply *yes* because there must not be the same > Message-ID's for different messages because the words "single > unique message identifier" are pretty clear I'm more concerned about intentional abuse. For example if you're dropping duplicate messages by Message-ID, I could first send this reply to you privately, and then another message with same Message-ID: but different content to the mailing list, and you'd never know it without looking into the archives from web. Also I wouldn't be surprised if there still were some crappy webforms that always sent the same Message-Id..
