RE: [vps-mail] How to block Spam with fake MessageID?

["Martin Fischer" <martin.fischer@xxxxxxxxxxxxx>]

okay maybe I was not clear enough, how to make sure that SA is not accepting non-local mails with 
local message-id (i.e. atvirt14.atvirtual.net)?

-----Original Message-----
From: owner-vps-mail@xxxxxxxxxxxx [mailto:owner-vps-mail@xxxxxxxxxxxx] On Behalf Of Scott Wiersdorf
Sent: Monday, September 08, 2003 2:31 PM
To: vps-mail@xxxxxxxxxxxx
Subject: Re: [vps-mail] How to block Spam with fake MessageID?


On Sun, Sep 07, 2003 at 11:27:33AM +0200, Martin Fischer wrote:
> 2 examples:
> 
> Message-ID: <200309050509.h85593BN089197@xxxxxxxxxxxxxxxxxxxxxx>
> Message-ID: <HDD1GD5CGCKHB603@xxxxxxx>

Can you tell me how these, by RFC standards, are fake? I've seen a wide variety of Message-ID fields over the years. RFC 822
guidelines exist for creating the unique message id, but there is no specified format, afaik, except that it be an 'addr-spec',
which is simply any valid global address format (local-part "@" domain).

What you _can_ do is identify the kind of format you wish to filter for (i.e., give us some examples of one kind of message id you
want to filter for) and we could probably help you write the recipe to do that. But since 'Message-ID' is nearly free-form (it
simply has to be unique and follow addr-spec from RFC822), you're going to have lots of false positives by trying to get everything
to fit into one format.

Scott
-- 
Scott Wiersdorf
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