message tags

[Tom Allison]

David Relson wrote:
> Matthias,
> 
> This month I've received 18,000+ spam.  Out of curiosity I ran a
> modified bogolexer and printed the 3 attributes that bogofilter
> identifies - msg_addr, msg_id, and queue_id.  I then sorted and counted
> them.  Here's a table of counts vs repeats:
> 
>   15841 1
>     537 2
>     304 3
>     256 4
>      18 5
> 
> For example, 15,841 messages were unique (count=1) and 18 messages for
> which 5 copies were received.  Checking further each of the 18 message
> sets contains 5 addresses for my domain, e.g.:
> 
>   To: linda at example.com
>   Cc: relson at example.com, eric at example.com,
> 	mark at example.com, webmaster at example.com
> 
> The actual messages differ only in the "X-Original-To:" and
> "Delivered-To:" attributes:
> 

Do these 18 emails use the same five Message-ID values?
Are the Messages themselves (Body/Subject) actually different?

I ask because I would expect that the formail -D option may take care of 
these for you.