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Re: Iptables

The Wanderer a écrit :
> When you hit Reply on an E-mail using a modern mail client (and quite a
> few non-modern ones), in addition to generating a new Message-ID for
> your reply, the mail client creates another header called "In-Reply-To".
> It copies the Message-ID from the original mail into this new header.

It also adds the message-ID into the "References" header, which contains
all the thread history, so that missing messages won't break the thread.

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