On Mon, 15 Sep 2003, Ken Anderson wrote:
> There's a proxy server that supports pop3 called prometo on sourceforge
> that recently added SA support. I've tested it with qpopper, and it
> works good with SA, but there's no way to do per user rules. Pretty cool
> to do this on the pop3 side tho.
All of these are still automated forms of JHD (Just Hit Delete)
There is a _LOT_ of collateral damage from the practice of JHD.
Genuine messages ("False positives") rejected by spam filters at MTA
level result in reject messages arriving back at the original
(non-forged) sender address, so they at least know something went wrong.
Any form of delete filtering after the message hits a user's inbox
means that False Positives are silently dumped.
I've just been through this problem at $orkplace with a vendor's support
mailbox silently trashing our mail, resulting in near-cancellation of a
$100,000 contract. If their spam filters had been rejecting our messages
we'd at least have known to phone them, instead of assuming we were
being ignored.
Anyone doing MUA-level or POP3/IMAP-server-level filtering-by-deletion
does so at their own peril. This is something which is best done in the
SMTP handshake (it's trivial to reject messages after DATA and before
the end-of-conversation.)
