Compiling on Windows, and a question of policy

Peter Beckman
Mon Dec 2 16:35:53 UTC 2002

So approximately 700MB of data per day, based on a 7K per message including
headers.  That comes out to approximately 8.10KBps or 64.8Kbps in
bandwidth, or about a modem's worth of bandwidth per day on average.  I'd
say that given the ebb and flow of data, expect 4 times that average at
peak, or topping out at ~259Kbps during peak times, much less on other
days.  That's about 17% of a T1 being used a peak times.  I'm basing the 7K
per message on the size of my spam mailbox of 10,051 messages divided by
the ~68MB in size of that mailbox.


On Mon, 2 Dec 2002, Vernon Schryver wrote:

> > From: "John R Levine" <>
> > ...
> > I'm considering building a lowish end mail appliance using DCC, but if I
> > do, it'll be running something unixish so it can run its own server, and
> > I'd charge a monthly maintenance fee which would include access to other
> > servers.
> > ...
> The 15-bit DCC server-ID makes having a zillion small servers impossible
> without using uglinesses such as the server-ID translation kludge.
> However, a low-end appliance could pay for the use of external servers.
> I think there's enough de facto load balancing in the protocol and
> the client code to make this work fine.  Each DCC client tracks up to
> 8 server names and the current DCC RTTs for as many as 16 IP addresses
> among those names.  If you spread the servers around, the appliance
> would either be able to see servers on the Internet or would not see
> much mail to filter.
> The current daily bandwidth required for DCC flooding is similar
> to the bandwidth needed to check about 100,000 mail messages/day.
> A DCC server wants about 128 MByte of RAM to start and perhaps
> another 50 MByte per 100K mail messages/day.  See
> Vernon Schryver
> _______________________________________________
> DCC mailing list

Peter Beckman                                                  Internet Guy                   

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