On Fri, Feb 25, 2011 at 02:38:16PM -0800, Robert Goodyear wrote:
> > Have you seen problem relays in your upstream relay mix? What real
> > symptoms do they exhibit and what is the observed impact on the upstream
> > Postfix SMTP client?
>
> I'm going to run some analytics on my last 12 months' worth of outbound
> messages to get more scientific with my gut instincts here. It's about 270
> million messages, and my observation is that when we have a spike of 4 or
> 5 million that need to deliver at a certain point in time (surrounding a
> critical/time-sensitive product launch) that my deferred queues saturate
> too quickly.
20 million a month is a moderate mail flow if it is mail from ~50-100K
users spread out over the day. I would then expect no more than ~1K
messages in the deferred queue of each ~4 machines to be about the right
quantity of deferred email.
4 million messages to deliver all at once is a very different problem.
--
Viktor.
