Re: [Asrg] Re: bounces, and anit-spam principles

["David Nicol" <davidnicol at gmail.com>]

On 1/23/07, Barry Shein <bzs at world.std.com> wrote:
> Suffice it to say that we can add fast, capable mail servers and see
> them flooded in a matter of hours.
>
> Pushing all the filtering to the end-user would make that much
> worse.

not the filtering, just the filter configuration.  MTA-resident complex
content filtering with different per-recipient outcomes is not compatible
with recipient enumeration preceding the data block; therefore the
DATAFIRST ESMTP proposal I made some months ago.

> Being able to "slam the phone down" on miscreant IP blocks at the
> accept() or helo is much, much, less processing than going thru the
> entire SMTP interaction and whatever it takes to pass processing off
> to an end-user.

even less is turning them off at the firewall.

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