Postfix and Mailscanner sitting in a tree k-iss-ing

[paddy]

On Thu, Dec 30, 2004 at 06:00:20PM +0000, Julian Field wrote:
> Incidentally, something in the same vein has already been done for
> Communigate Pro, but I have never looked at that. I suspect (though
> without evidence either way) that it is not approx. 100% robust in the
> face of a concerted DoS attack. I go to some lengths to try to ensure
> that, when under attack, the MTA will give out long before MailScanner does.

Julian,

Overnight I got to thinking about this ... which is a dangerously long period
of time :)

Looking at CriticalQueueSize I wonder if there might be some optimisation
possible that prefers to processes mail that is more likely to ham by some
simple criteria, a sort of express checkout.

Possible devices to avoid starvation on the main queue could include running
a slow queue along side the fast queue, so that the system is always progressing,
and/or an elevator algorithm.

Regards,
Paddy
--
Perl 6 will give you the big knob. -- Larry Wall

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