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Re: [Asrg] Please critique my anti-spam system
>>> No innocent user will ever get an erroneous bounce if a few of the
>>> large consumer ISP adopt the system;
>> [???]
> I was unclear. What I meant was that it would be a simple matter for
> and email provider to recognize a bounce sent via my system.
Yes, though it's questionable whether anyone would want to implement
special-case recognition for every new C/R challenge out there. I
certainly am not interested in doing so.
Perhaps this needs to be another FUSSP criterion: "it assumes it's the
only system in use, or at least that everyone will be willing to add
special cases for it".
> The email provider could then check to see if the recipient had
> previously sent out an email to the supposed source of the bounce.
So, no more road-warrior outgoing email? All must be tunneled back to
home? (Nothing wrong with that per se, but it certainly could be made
clearer, as it will be an important caveat.)
> If the recipient had not sent out this earlier email then the bounce
> that is coming in must obviously be an erroneous bounce and it would
> then be blocked. Now there is no chance that anyone would receive an
> erroneous bounce.
Well, no. Not anyone. Only people behind such checks.
> If my system is used on a small scale then I would not expect any
> email provider to lift a finger to adjust their system to filter out
> these erroneous emails. If, however, some of the large consumer
> email providers used this system then I believe that most other email
> providers would recognize this system and begin filtering out
> erroneous bounces as described above.
Yes - but that can be done without needing your system. My mailer
already rejects most bounces of mail I didn't send. ("Most" because
the check it does is a relatively weak one and every once in a while it
mistakes a forgery for mail I sent. So far this has not happened
frequently enough to make me soup up the check.) Of course, this
depends on all mail I send exhibiting certain characteristics, which I
make sure it does.
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