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Re: eliminating mail duplicates fails recently

From: Justin Erenkrantz <justin_at_erenkrantz.com>
Date: Thu, 11 Dec 2008 17:17:17 -0800

On Thu, Dec 11, 2008 at 4:21 PM, Greg Stein <gstein_at_gmail.com> wrote:
> And the failure mode for that? "oh poor little me!! I got one duplicate this
> YEAR!!!"

No, it'd be the opposite - you'd miss messages that aren't unique as
you think they are a dup when they really aren't. Additionally, there
are some mailing lists configs out there that munge Message-IDs into
patterns that either invite collisions or, even worse, assign a new
Message-ID per-SMTP delivery basically nullifying any Message-ID
de-dup checks. Lame, but true. *shrug*

Anyway, it's not 'unique by definition' and if you do filter dups
based on it, just be aware that it's not bullet-proof.

We're slowly descending into "MD5 vs SHA-256 collision" territory
though. *grin* -- justin

Received on 2008-12-12 11:45:06 CET

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