On Thu, 26 Jun 2003, Steve Feehan wrote:
> How about having your spam filter add an 'X-' header rather than munge
> the subject line? People could still have procmail sort/dump the mail.
> Those who aren't interested would never know the difference.
PureMessage does add a X-PureMessage-Spam: header, which is what the
central procmail filters use for filtering. So, we're doing that. We
decided to add the subject modification, for now at least, for several
Some people, mostly POP users, don't use server-side filtering, and some
clients apparently can't use X- headers for filtering (need
Some people don't do filtering, but use the visible subject modification
to help delete spam before opening it. They find it helps quickly sort
Basically, we're trying both Subject and X- header and seeing how it works
out. As we get more feedback, we will evaluate current settings, and
adjust if it's appropriate.
Many people would never know it was available if it wasn't obvious, so
the tool would be less useful for many people without the subject