Meng Weng Wong <mengwong(_at_)dumbo(_dot_)pobox(_dot_)com> wrote:
BTW, verbatim forwarding is practiced not just by unixheads
with .forward files, but also by hosted domains, of which
there are millions in existence, and alumni / lifetime email
services like alumni.*.edu and acm.org.
Which have well-known names and IP addresses, unlike "hit and run"
spammers.
The hosting providers can implement workarounds, and
forwarding service providers can implement workarounds.
From the receiver end, trusted-forwarder.org lets receivers
whitelist forwarding hosts.
Exactly. There are multiple ways possible to get to a widely
deployed system of checking return paths. The deployment can be
gradual, with well-understood incremental benefits at each stage.
That leaves only the ad-hoc forwarding setups. For those
cases, I would like to be able to tell them "just upgrade".
I agree.
Alan DeKok.