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Re: [Gnu-arch-users] Re: Describing archives (new feature at the mirror)

From: Julian T J Midgley
Subject: Re: [Gnu-arch-users] Re: Describing archives (new feature at the mirror)
Date: Sat, 3 Apr 2004 00:45:14 +0100 (BST)

On Fri, 2 Apr 2004, Andrew Suffield wrote:

> The only sane place where it can be fixed is at the sender
> end. Removal of duplicates without opening trivial DoS attacks against
> your mailbox is impossible.

This is arrant nonsense.

> By the time the duplicate mails reach the destination, they have been
> significantly munged by the MLM; this list runs on mailman, which is
> spectacularly bad in this respect. Now which one are you supposed to
> deliver?

Erm, unless your MLM is spectacularly appalling (and mailman isn't (nor is
any MLM that runs any list I've ever been subscribed to)) it won't alter
the Message-Id header, which was, after all, designed to be unique per
message.  So keep a cache of message-ids you've already seen, and throw
any duplicates (arranging for your filters to drop the first copy of each
mail into your inbox or mailing list boxes as you prefer).

All the best,


Julian T. J. Midgley             
Cambridge, England.
PGP: BCC7863F FP: 52D9 1750 5721 7E58 C9E1  A7D5 3027 2F2E BCC7 863F

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