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

[Scott Wiersdorf <scott@xxxxxxxxxxxx>]

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
scott@xxxxxxxxxxxx
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