I've so far preferred SA-Exim to the exiscan spam condition because the latter
is somewhat limited as to what you can do to with the messages you decide to
let through (you only have $spam_score(_int), $spam_bar and $spam_report to
play with).
There is an idea to add a new method to spamd that just returns the headers
that SpamAssassin would have added (see
http://issues.apache.org/SpamAssassin/show_bug.cgi?id=4469). I don't know
what might become of that idea but if it becomes reality I think the new
method would be the best one to use (because you could easily achieve the
same result whether messages are passed through Exim calling SA or through
spamassassin directly). Let's say that you in some future version could do
warn add_header = $spam_headers
There is one issue though, and that is that if SA-rewritten headers are to be
included, then either you can't use rewrite_header in SA or you'd need a
complicated construct in the system filter to remove all headers found in
$spam_headers before the new headers could be added.
It could therefore conceivably be very handy to have a filter command that
would *replace* headers in one action. It can probably be useful in other
situations as well.
What do you think?
--
Magnus Holmgren
