[Asrg] Re: user-level blacklisting patented

[Bruce Lilly <blilly at erols.com>]

>  Date: 2005-03-17 21:39
>  From: Claus Assmann <ca+asrg at esmtp.org>

> On Thu, Mar 17, 2005, Peter Kay wrote:
> 
> > Our patent gives each end-user their own list that gets applied at the MTA.
> 
> That stuff has been done for sendmail 8.9 (released 1998) by Jan
> Krueger via custom rulesets ("check_local").

And has been in the sendmail code in the form of the
checkcompat() function since at least version 5.61, in the
early '90s.  That function takes sender and recipient information
and returns a binary result.  It's not a big secret: sendmail
source has been widely available for decades.

>  Date: 2005-03-17 21:20
>  From: "Peter Kay" <peter at titankey.com>

> Did you back in 2000 have a feature to maintain whitelists for individual
> users

The functionality was there a decade earlier.

> If this was so "obvious", then how many products have been created that
> employ our claims?

At least one.

> As of about a year ago, we couldn't find any.   

I guess you didn't look very hard...

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