Sorry bubbie, send me a challenge and you go into the evil list, which
tends to be a permanent /dev/null redirect. This is iron clad on a
mailing list. Direct I may or may not consign. C/R is plain evil as I
have encountered it in the past. On mailing lists it's beyond evil as
it generates challenges from every message sent to the list as the
list server never responds to the challenges.
I'm rather inflexible on Challenge/(lack of) Response because of my
experience on the wrong end of it.
{','} C/R sucks dead bunnies through garden hoses.
----- Original Message -----
From: "RW" <rwmailli...@googlemail.com>
Sent: Saturday, 2010/December/04 08:08
On Sat, 04 Dec 2010 12:44:37 +0100
Bernd Petrovitsch <be...@petrovitsch.priv.at> wrote:
C/R is only means to make it move your own effort over to others.
The really "interesting" case is if both sides choose to require C/R
to get the first mail delivered.
Which should be a clear sign to everyone that C/R is basically a bad
idea.
That's only a problem in very naive C/R systems. It can be solved by
using a time-limited disposable address in the envelope "mail from".
The recipient's challenge goes to the disposable address which bypasses
the senders own C/R system. Some mailservers already do this because it
eliminates almost all backscatter while allowing remotely generated
legitimate DSNs to pass.
Infuriating advocates of C/R pretty much have an answer for everything.
If a benign dictator imposed a well thought-out scheme on everyone, it
would probably work very well.
At the moment though spam isn't that much of a problem, and C/R is more
trouble than it's worth.
