Ignore lists

[David Relson]

On Wed, 03 Mar 2004 19:17:54 +0100
Matthias Andree wrote:

> David Relson <relson at osagesoftware.com> writes:

...[snip]...

> As I understand it, Bob suggests ignoring headers with a particular
> name altogether, pretending, for instance, that all X-Spam-Status:
> headers had not been there.
> 
> This scheme is employed by many spam taggers, for instance, spamprobe
> used to have a hardcoded set of headers it looks at and ignored every
> other header.
> 
> This feature is a bit different from the "ignore list" - the latter
> would apply to tokens, the former would apply to headers. For headers
> with a stable ordering, such as Received:, a sophisticated feature,
> say"ignore first 7 Received: headers" or "ignore last 7 Received:
> headers" can be helpful.
> 
> We could provide these headers and let users experiment whether they
> are helpful or not.

True.  Ignoring tokens (via ignore lists) is different from ignoring
lines.  What ideas have you on this?  So far, "ignore 'X-ABC:' lines"
and "ignore 1st n ABC:" lines have been suggested.  What else?