Guaranteed deliverability is a big thing. Divide that by the fraction
that are delivered now, and see how big it looks.
I had hoped that use of ISACS would be efficacious enough so that no spam
filtering of any kind would be needed for emails that were sent using a proper
sub-address. From the reaction on this list it is obvious that routine
filtering should also be applied to emails sent with a proper sub-address.
Problem solved.
A relatively weak filter would likely suffice, so ISACS would still
produce fewer false positives than current filters.
Or use a strong filter - whatever floats your boat.
Also there has been some misunderstanding concerning my assertion that bogus
addresses would impede spammers. If the spammer is paying someone to manually
decode the CAPTCHA then being forced to decode the CAPTCHA of a bogus email
account will impede (i.e. cost money) the spammer.
Michael Kaplan
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