SMTP rate-limits [Was: Re: ingress SMTP]

[dot at dotat.at (Tony Finch)]

On Fri, 5 Sep 2008, Michael Thomas wrote:
>
> I thought that these bot nets were so massive that it is pretty
> easy for them to fly under the radar for quotas, rate limiting, etc.
> Not that all bot nets are created equal, and there aren't local hot
> spots for whatever reason, but putting on the brakes in a way that
> users wouldn't feel pain is simply not going to make any appreciable
> difference in the overall mal-rate.

Right.

In practice the rate of delivery failures is a more useful indication of
spam than the overall email rate.

Tony.
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